(a)[2]
Find the probability that Kayla needs more than $6$ throws to get a success.
(b)[3]
Find the probability that, from a random sample of $10$ throws, Kayla gains at least $3$ successes.
Mathematics 9709 · AS & A Level · Discrete random variables
Discrete random variables — practice question
Kayla is taking part in a throwing event. A throw counts as a success when the distance thrown is more than $30$ metres. The probability that Kayla gets a success on any throw is $0.25$.