The median of the following data is 525 . Find the values of x and y , if total frequency is 100 . Class 0 - 100 100 - 200 200 - 300 300 - 400 400 - 500 500 - 600 600 - 700 700 - 800 800 - 900 900 - 1000 Frequency 2 5 x 12 17 20 y 9 7 4

Cumulative frequency for the given data; Class interval Frequency f Cumulative frequency CF 0 - 100 2 2 100 - 200 5 7 200 - 300 x x + 7 300 - 400 12 x + 19 400 - 500 17 x + 36 500 - 600 20 x + 56 600 - 700 y x + y + 56 700 - 800 9 x + y + 65 800 - 900 7 x + y + 72 900 - 1000 4 x + y + 76 total Σ f = 76 + x + y = 100 Given that the median is 525 . So median class is 500 - 600 Now median = l + N 2 - C F f × h where l = 500 , h = 100 , N = 100 , C F = 36 + x , f = 20 so, 525 = 500 + 100 2 - ( 36 + x ) 20 × 100 ⇒ 525 - 500 = ( 50 - ( 36 + x ) ) × 5 ⇒ 25 = ( 14 - x ) × 5 ⇒ x = 9 Also, Σ f = 76 + x + y = 100 ⇒ 9 + y = 100 - 76 ⇒ y = 15 Hence, x = 9 and y = 15

Fifty students recorded how much they spent on eating out in one month (to the nearest dollar). The results are shown in the partially complete frequency table: Class interval Class boundaries Frequency 1 - 10 0 . 5 - 10 . 5 14 11 - 20 10 . 5 - 20 . 5 13 21 - 30 15 31 - 40 0 41 - 50 4 51 - 60 3 61 - 70 1 State the class that contains the median.

The given table shows the amount spent on eating out in one month by students The table of given data Class interval Frequency cumulative frequency 1 - 10 14 14 11 - 20 13 27 21 - 30 15 42 31 - 40 0 42 41 - 50 4 46 51 - 60 3 49 61 - 70 1 50 Now, let n = sum of all frequencies n = 14 + 13 + 15 + 0 + 4 + 3 + 1 = 50 as n is even, so the position of median is the class whose cumulative frequency is greater than n 2 lies. Therefore, the position of median is the class whose cumulative frequency is greater than 50 2 = 25 So, this will be possible in 11 - 20 interval. So, the median will be in the interval 11 - 20 .

Fifty students recorded how much they spent on eating out in one month (to the nearest dollar). The results are shown in the partially complete frequency table: Class interval Class boundaries Frequency 1 - 10 0 . 5 - 10 . 5 14 11 - 20 10 . 5 - 20 . 5 13 21 - 30 15 31 - 40 0 41 - 50 4 51 - 60 3 61 - 70 1 State the modal class.

The given table shows the amount spent on eating out in one month by students The modal class is the class interval with the highest frequency. So, here we have highest frequency of 15 in class 21 - 30 So, 21 - 30 is the modal class of given data

A taxi driver records the distances of his journeys, to the nearest km, over the course of a long weekend shift. Distance 1 - 5 6 - 10 11 - 15 16 - 20 21 - 25 Frequency 10 6 8 5 2 Write down the modal class.

Given frequency table is Distance 1 - 5 6 - 10 11 - 15 16 - 20 21 - 25 Frequency 10 6 8 5 2 The modal class is the class interval with the highest frequency. So, here we have highest frequency of 10 in class 1 - 5 . So, 1 - 5 is the modal class of given data

Embibe Experts Solutions for Chapter: Statistics, Exercise 1: Exercise

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Embibe Experts Mathematics Solutions for Exercise - Embibe Experts Solutions for Chapter: Statistics, Exercise 1: Exercise

Attempt the practice questions on Chapter 14: Statistics, Exercise 1: Exercise with hints and solutions to strengthen your understanding. Mathematics Crash Course (Based on Revised Syllabus-2023) solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Chapter: Statistics, Exercise 1: Exercise with Hints & Solutions

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10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 1

The median of the following data is $525$ . Find the values of $x$ and $y$ , if total frequency is $100$ .

Class	$7$	$100 - 200$	$200 - 300$	$300 - 400$	$400 - 500$	$500 - 600$	$Σ f = 76 + x + y = 100$	$700 - 800$	$800 - 900$	$900 - 1000$
Frequency	$2$	$5$	$x$	$12$	$17$	$20$	$y$	$9$	$7$	$4$

EASY

10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 3

In his end of year exams, Joe scored the following:
Science $34 %$
English $90 %$
History $87 %$
Math $34 %$
Geography $55 %$
What was the mean?

EASY

10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 6

Fifty students recorded how much they spent on eating out in one month (to the nearest dollar). The results are shown in the partially complete frequency table:

Class interval	Class boundaries	Frequency
$1 - 10$	$0.5 - 10.5$	$14$
$11 - 20$	$10.5 - 20.5$	$13$
$21 - 30$		$15$
$31 - 40$		$0$
$41 - 50$		$4$
$51 - 60$		$3$
$61 - 70$		$1$

State the class that contains the median.

EASY

10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 7

Fifty students recorded how much they spent on eating out in one month (to the nearest dollar). The results are shown in the partially complete frequency table:

Class interval	Class boundaries	Frequency
$1 - 10$	$0.5 - 10.5$	$14$
$11 - 20$	$10.5 - 20.5$	$13$
$21 - 30$		$15$
$31 - 40$		$0$
$41 - 50$		$4$
$51 - 60$		$3$
$61 - 70$		$1$

State the modal class.

EASY

10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 8

A taxi driver records the distances of his journeys, to the nearest km, over the course of a long weekend shift.

Distance	$1 - 5$	$6 - 10$	$11 - 15$	$16 - 20$	$21 - 25$
Frequency	$10$	$6$	$8$	$5$	$2$

Write down the modal class.

MEDIUM

10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 11

Your tutor says that your test scores in Physics are better than your test scores in Chemistry. Your results (out of $100$ ) for the last six tests in each subject are presented in this table:

Chemistry	$56$	$64$	$66$	$58$	$72$	$81$
Physics	$64$	$62$	$72$	$73$	$60$	$70$

Comment on your tutor's claim.

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10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 12

You suspect that boys are spending more money than girls in your school canteen. You stand by the cashier one lunch time and record the amount spent by the first ten girls and by the first ten boys. The amounts you record are as follows:

Boys		Girls
$$ 3.12$	$$ 1.00$	$$ 4.00$	$$ 2.51$
$$ 4.00$	$$ 6.37$	$$ 1.37$	$$ 0.88$
$$ 4.00$	$$ 4.00$	$$ 4.00$	$$ 4.00$
$$ 5.16$	$$ 3.82$	$$ 4.00$	$$ 4.80$
$$ 2.13$	$$ 3.65$	$$ 2.32$	$$ 3.55$

Comment on the claim that boys spend more than girls in the canteen.

EASY

10th Goa Board

IMPORTANT

Mathematics Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Statistics>Exercise>Q 13

The number of text messages sent by $17$ adults in one week are shown below.
$36, 40, 22, 8, 16, 19, 48, 62, 27, 22, 34, 31, 36, 28, 30, 12, 20$

Find the mean and median number of texts sent.

Embibe Experts Solutions for Chapter: Statistics, Exercise 1: Exercise

Embibe Experts Mathematics Solutions for Exercise - Embibe Experts Solutions for Chapter: Statistics, Exercise 1: Exercise

Questions from Embibe Experts Solutions for Chapter: Statistics, Exercise 1: Exercise with Hints & Solutions

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