MEDIUM
Earn 100

A school has teachers, one of them retires at the age of years and a new teacher replaces him, this change reduces the average age of the staff by years, the age of new teacher is
(a)
(b)
(c)
(d)

50% studentsanswered this correctly
Important Questions on Measures of Central Tendency
MEDIUM
Observe the following table
If the above data has mean , then missing frequencies and are respectively

MEDIUM
The average of first five multiples of is


EASY
Consider the following distribution:
class | frequency |
If the mean of the above distribution is , what is the value of ?

MEDIUM

EASY

HARD

EASY

EASY

MEDIUM

EASY

EASY
. Find the mean score obtained by the team?

EASY

MEDIUM

MEDIUM
Read the following frequency distribution for two series of observations and answer the two items that follow: Series I and Series II is the given frequency.
Class Interval | Series- I | Series- II |
X | ||
Y | Y | |
Total |
What is the mean of frequency distribution of Series- I?

EASY

EASY

MEDIUM

EASY

MEDIUM
The mean and median of is-
1. and $5$
2. and $5.5$
3. and $6$
4. and $5.5$

