A bag contains 7 green and 5 black balls. Three balls are drawn one after the other. The probability of all three balls being green, if the balls drawn are not replaced will be:
Here, n(E) = 7C1×5C1×5C1
And, n(S) = 12C1*11C1*10C1P(S) = 7*6*512*11*10 = 7/44
Find the range and mode of the data 17, 18, 28, 19, 16, 18, 17, 29, 18
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