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Binomial probability of at most two successes and of the third success occurring on the final trial

Binomial probability of at most two successes and of the third success occurring on the final trial

6 marks

Each time a spinner is spun, the probability that it lands on red is \(0.35\), independently of every other spin.

The spinner is spun eight times. Calculate the probability that

  1. the spinner lands on red no more than twice.[3]
  2. the spinner lands on red for the third time on the eighth spin.[3]

Solution:

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Answer:(a) \(0.428\) (b) \(0.104\)

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