2018
Mathematics
67ca00ce0c643c71d77dee1f
The probabilities that John and James pass an examination are 3/4 and 3/5 respectively. Find the probability of both boys failing the examination.
A.
1/10
B.
2/10
C.
9/20
D.
11/20
Correct Answer: 11/20
Explanation
Pr(both John and James passed) = 3/4 x 3/5 = 9/20 Pr(john and james failed)= 1-Pr(john and james passed) = 1 – 920 = 11/20
Pr(both John and James passed) = 3/4 x 3/5 = 9/20 Pr(john and james failed)= 1-Pr(john and james passed) = 1 – 920 = 11/20THIS WEEK's
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