Q6 of 99 Page 33

Mark the correct alternative in the following:

A fair die is thrown twenty times. The probability that on the tenth throw the fourth six appears is


Given:


Total outcomes= 610


Fourth 6 is at 10th place.


So other three 6 have to be placed at any of the remaining 9 places=9C356


For remaining 5 places we have 1,2,3,4&5


So total number of favorable cases


More from this chapter

All 99 →
4

Mark the correct alternative in the following:

A fair coin is tossed a fixed number of times. If the probability of getting seven heads is equal to that of getting nine heads, the probability of getting two heads is


 5

Mark the correct alternative in the following:

A fair coin is tossed 100 times. The probability that on the tenth throw the fourth six appears is


 7

Mark the correct alternative in the following:

If X is a binomial variate with parameters n and p, where 0 < p < 1 such that is independent of n and r, then p equals.


 8

Mark the correct alternative in the following:

Let X denote the number of times heads occur in n tosses of a fair coin. If P (X = 4), P(X = 5) and P(X = 6) are in AP; the value of n is