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Question 1003509: From a batch containing 6 boys and 4 girls a group of 4 students is to be selected.how many group formations will have exactly 2 girls write all steps?
Answer by jorel555(1290)   (Show Source):
You can put this solution on YOUR website! The probability of selecting 4 girls, one at at time is:
.4*.4*.4*.4=.0256
The probability that ANY two girls will be picked out of 4 students is 4 choose 2, or 4!/2!2!, which equals 12.
.0256*12=.3072 which equals a 30.72% percent chance that precisely two girls will be selected.
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