MEDIUM
10th Tamil Nadu Board
IMPORTANT
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A page is selected at random from a book. The probability that the digit at units place of the page number chosen is less than 7 is,

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Important Questions on Statistics And Probability

EASY
10th Tamil Nadu Board
IMPORTANT
The probability of getting a job for a person is x3. If the probability of not getting the job is 23, then the value of x is
EASY
10th Tamil Nadu Board
IMPORTANT
Kamalam went to play a lucky draw contest. 135 tickets of the lucky draw were sold. If the probability of Kamalam winning is 19, then the number of tickets bought by Kamalam is
MEDIUM
10th Tamil Nadu Board
IMPORTANT
If a letter is chosen at random from the English alphabets a, b,...,z, then the probability that the letter chosen precedes x
MEDIUM
10th Tamil Nadu Board
IMPORTANT
A purse contains 10 notes of 2000, 15 notes of 500, and 25 notes of 200. One note is drawn at random. What is the probability that the note is either a 500 note or 200 note?
HARD
10th Tamil Nadu Board
IMPORTANT

The mean of the following frequency distribution is 62.8 and the sum of all frequencies is 50. Compute the missing frequencies f1 and f2.

ClassInterval 0-2020-4040-6060-8080-100100-120Frequency 5f110f278

HARD
10th Tamil Nadu Board
IMPORTANT

The diameter of circles (in mm) drawn in a design are given in the table. Calculate the standard deviation.

 Diameters 33-3637-4041-4445-4849-52 Number of clrcles 1517212225

HARD
10th Tamil Nadu Board
IMPORTANT

In the frequency distribution table, k is a positive integer, has a variance of 160. Determine the value of k.

x k 2k 3k 4k 5k 6kf211111

MEDIUM
10th Tamil Nadu Board
IMPORTANT
The standard deviation of some temperature data in degree Celsius C is 5. If the data were converted into degree Fahrenheit F, then what is the variance?