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Question 1
The mean of distribution is 18 and the standard deviation is 4.5. What is the value of the coefficient of variation?
Question 2
The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x.
29, 32, 48, 50, x, x+2, 72, 78, 84, 95
29, 32, 48, 50, x, x+2, 72, 78, 84, 95
Question 3
Variance of the data 2, 4, 5, 6, 8, 17 is 23.33. Then the variance of 4, 8, 10, 12, 16, 34 will be:
Question 4
One card is randomly drawn from a pack of 52 card. What is the probability that drawn card is of black color?
Question 5
A bag contains 3 red ball, 2 blue ball and 4 yellow ball, all the balls being of the same size. Nandu takes out a ball from the bag without looking into it. What is the probability that he takes out the red ball?
Question 6
The standard deviation of a population is 10, what would be the population variance?
Question 7
The sum and mean of an observation are 256 and 32 respectively. What is the number of observation?
Question 8
A missing plane is reported to have crashed somewhere in a rectangular region of size 
in the North Atlantic Ocean. The region also covers the Bermuda Triangle (Devil’s Triangle) which has an area approximately 
. What is the probability that it crashed inside the Devil’s triangular region?
in the North Atlantic Ocean. The region also covers the Bermuda Triangle (Devil’s Triangle) which has an area approximately . What is the probability that it crashed inside the Devil’s triangular region? Question 9
One card is drawn from a well-shuffled pack of 52 card. What is the probability that drawn card is a king?
Question 10
The wicket taken by a bowler in 10 cricket matches are as follows:
2, 6, 4, 5, 0, 2, 1, 3, 2, 3
What is the mode of the data?
2, 6, 4, 5, 0, 2, 1, 3, 2, 3
What is the mode of the data?
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Nov 18CDS & Defence
