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Mathematics 16 Online
OpenStudy (anonymous):

2 bananas are to be selected from a group of 7. In how many ways can this be done?

OpenStudy (anonymous):

1 5,040 21 42

OpenStudy (anonymous):

42 maybe

OpenStudy (anonymous):

how would you figure this out?

OpenStudy (anonymous):

while SELECTING use this rule, if there are 'n' choices for 'r' places, then there are nCr choices, and nCr = n!(n−r)!r! So, 9C3=9!(9−3)!3!

OpenStudy (anonymous):

ok thankyou

OpenStudy (anonymous):

welcome

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