how many selections can be made by choosing 6 letters at a time from the word-PROPORTION

Asked by  | 3rd Jul, 2009, 06:56: PM

Expert Answer:

number of selection = 10 C6 = 10C4 = 10 x 9 x 8 x 7 / 1 x 2 x 3 x 4

                                     = 210

Answered by  | 4th Jul, 2009, 04:16: PM

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