Question

HELP?! I don't understand this question!!

Answer 1

Answer:

0.48

Step-by-step explanation:

Given :

The washing machine takes 22 minutes for soaking, 28 minutes for washing, 8 minutes for rinsing.

To Find :

If we go and watch the washing machine working some time (the time is random),. find the probability that it is washing (instead of rinsing or soaking)

Solution :

The time taken by the washing machine for soaking = 22 minutes,

The time taken by the washing machine for washing = 28 minutes,

The time taken by the washing machine for rinsing = 8 minutes,.

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the probability that it was washing when we approach it at a radom time = $P(A) = \frac{n(A)}{n(S)}$ = $\frac{time \ taken \ for \ washing}{total \ time}$

= $\frac{28}{22 + 28 + 8} = \frac{28}{58}$ ≈ 0.48