further probability s1 question Watch

Nitrox
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#1
Report Thread starter 12 years ago
#1
At a small branch of the midwest bank the manager has a staff of 12, consisting of 5 men and 7 women including a Mr Brown and Mrs Green. The manager recieves a letter from head office saying that 4 of his staff are to be made redundant. In the interests of fairness the manger decides to select 4 staff at random.

how many of these selections include both Mr Brown and Mrs Green
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#2
Report 12 years ago
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Well there are 4 staff to be chosen, 2 are Mr Brown and Mrs Green, so there are 2 more to chose, from 10 members of staff.

So It's 10C2 = 45
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