
The probability of drawing a red marble on the first attempt is

After the first marble is drawn, and we know it to be red, we're drawing the next marble from a pool with one less marble than before (i.e. conditioning on the event

). So

And so
Answer:
12 of the clients had long hair
Step-by-step explanation:
12 had long hair, 8 had short hair
4:7 = 8:14
4 x 2 = 8. 7 x 2 = 14
Answer:
Step-by-step explanation:
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