Mathematics: There are 20 black cell phones and 30 white cell phones in a store. An employee takes 10 phones at random. Find the probability that A. there will be exactly 4 black cell phones among the chosen phones; B. there will be less than 3 black cell phones among the chosen phones.

6 quarts of milk will be needed...

There are 20 black cell phones and 30 white cell

yzafer3971

19.01.2022

A. 0.001 B. 0.012

Step-by-step explanation:

Since it is random selection P(B) =0.4 and P(W) =0.6

0.4^4*(0.6)^6 (A)

less than 3, can be 0,1 or 2 the probabilities of each will be determine and multiplied

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