For the following questions answer them individually
If the arithmetic mean of 17. 2a-b. 2b-c and 2c-a is 20 then the arithmetic mean of a, b, c is
The medianof the observations 7, 5. 2, 6, 4. 3, 15, 14, 19, 25, 8, 11, 13 is
The standard deviation of 12, 16, 23, 18, 24, 15 is
If x $$neq$$ 0 then the variance of x + 1, x + 2, x + 3, x + 7, x + 8, x + 9 is
From a well-shuffled deck of playing cards the probability of choosing a card at random which is either a red card or an ace. is
The probability for a number chosen at random from the first 32 natural numbers to be a composite, is
A bag contains 8 white balls and 6 red balls. The probability of drawing at random two balls of the same colour is
A six sided fairdie is rolled 3 times. Then the probability that the face with the number 6 on it will not face upward onthe three occasions is
The probability that P and Q get the scholarship are 0.6 and 0.8 respectively. Then the probability that exactly one of P. Q gets the scholarship is