Question

Ted regularly plays a target shooting competition in his yard. He is not very good at the game and his score has the following probability distribution.

score | 0 | 1 | 2 | 3 |

probability | 0.1 | 0.4 | 0.3 | 0.2 |

a. Find the expected value and standard deviation of Ted’s
score.

b. Find the probability that Ted’s score is at most 2.

c. Suppose he plays the game twice. Find the probability that his
total is at least 5

Answer #1

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