# Question: Every day Jo practices her tennis serve by continually serving

Every day Jo practices her tennis serve by continually serving until she has had a total of 50 successful sent If each of her serves is, independently of previous ones, successful with probability .4, approximately what is the probability that she will need more than 100 serves to accomplish her goal?

Imagine even if Jo is successful that she continues to serve until she has served exactly 100 times. What must be true about her Ant 100 serves if she is to reach her goal?

Imagine even if Jo is successful that she continues to serve until she has served exactly 100 times. What must be true about her Ant 100 serves if she is to reach her goal?

**View Solution:**## Answer to relevant Questions

One thousand independent rolls of a fair die will be made. Compute an approximation to the probability that the number 6 will appear between 150 and 200 times inclusively. If the number 6 appears exactly 200 times, find the ...A model for the movement of a stock supposes that if the present price of the stock is s, then, after one period, it will be either us with probability p or ds with probability 1 − p. Assuming that successive movements are ...The probability density function of X, the lifetime of a certain type of electronic device (measured in hours), is given by (a) Find P{X > 20}. (b) What is the cumulative distribution function of X? (c) What is the ...Use the identity of Theoretical Exercise 5 to derive E[X2] when X is an exponential random variable with parameter λ. Theoretical Exercise 5 Use the result that, for a nonnegative random variable Y, to show that, for a ...If X is a beta random variable with parameters a and b, show that E[X] = a/a + b Var(X) = ab/(a + b)2(a + b + 1)Post your question