Find the number of ways of selecting 8 subjects from 12 s...
Find the number of ways of selecting 8 subjects from 12 subjects for an examination
490
495
496
498
Correct answer is B
Combination is the number (n) of ways of selecting a number of (m) of objects from n
12C812!8!(12−8)!=12!8!4!(12×11×10×9×8×7×6×5×4×3×2×1)8×7×6×5×4×3×2×1Aftercancellingoutwehave11×5×9=495
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