A probability problem by Johnson Du
Probability
Level
1
The basketball player A's accuracy was 70%, player B was 80%. If they shoot at the same time, what is the probability of no in, one in and both of the ball in?
7%, 38%, 55%
8%, 36%, 56%
6%, 38%, 56%
9%, 35%, 56%
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1 solution
A=70% B=80%
First step: no in
100%-70%=30% 100%-80%=20% Rule of product 30% x 20%=6%
Second step: skip the second question, the third is more easier.
Rule of product 70% x 80%=56%
Third step: now lets take a look at the second questio
100%-6% (which is the first question) -56% ( second question) =38%