Maths Probability Tutorial 5

Test Your Skills

A)The probability that a student passes Mathematics is and the probability that he passes English is . If the probability that he will pass at least one subject is , what is the probability that he will pass both subjects? It is possible for a student to either:

Pass math only

Pass English only

Pass both math and English.
B)If the independent probabilities that three people A, B and C will be alive in 30 years time are 0.4, 0.3, 0.2 respectively, calculate the probability that in 30 years’ time,
(a) all will be alive

(b) none will be alive

(c) at least one will be alive

(A) 14/45
(a) .024 (b) .336 (c) .664