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What is the probability that a randomly chosen contestant tried raking the ground or charmed 5 - 10 worms

What is the probability that a randomly chosen contestant tried raking the ground-example-1
User Shashank G
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1 Answer

15 votes
15 votes

According to the problem, the probability that a contestant tried ranking the ground is 0.7 and the probability that a contestant charmed 5-10 worms is 0.3.

So, the probability of A or B happening is-


P(A\cup B)=P(A)+P(B)-P(A\cap B)

Because the events are not mutually exclusive, where


P(A\cap B)=P(A)\cdot P(B)=0.7\cdot0.3=0.21

Then,


P(A\cup B)=0.7+0.3-0.21=0.79Hence, the probability is 0.79.
User Ovolve
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