The probability that Skene will be alive in 5 years' time is ¾ and the probability that his wife Am in a will be alive in 5 years' time is 2/5. Find the probability that in 5 years' time (a) both of them will be alive (b) only Ekene will be alive Teachers in charge

  (a) 3/10

  (b) 9/20

Step-by-step explanation:

In order to answer this question, we must assume the probabilities are independent.

(a) p(both alive) = p(S alive)×p(A alive) = (3/4)(2/5) = 3/10

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(b) p(only S alive) = p(S alive)×p(A not alive) = (3/4)(1 -2/5) = 9/20

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m