From 7 boys and 5 girls, 6 are to be selected for admission for a particular course. In how many ways can this be done if there must be exactly 3 girls?

From 7 boys and 5 girls, 6 are to be selected for admission for a particular course. In how many ways can this be done if there must be exactly 3 girls? ?

Created: 1 week ago | Updated: 1 week ago | Created By:

Imran Ahmed

350

1050

120

0 1

Best Answer Explained in Below-:

Ways of selecting 3 girls out of 5 = 5C3 = 10 Number of boys to be selected = 6 - 3 = 3 Ways of selecting 3 boys out of 7 = 7C3 = 35 So, total ways = 10 x 35 = 350

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From 7 boys and 5 girls, 6 are to be selected for admission for a particular course. In how many ways can this be done if there must be exactly 3 girls? ?

A man can row a boat at 10 km/hr in still water. If the speed of the stream is 6 km/hr, the time taken to row a distance of 80 km downstream is:

The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

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