A

A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw ?

August 17, 2021

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0 18

August 17, 2021

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0 18

Answer : C. 64

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H

How many words can be formed from the letters of the word “AFTER”, so that the vowels never come together ?

August 17, 2021

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0 23

August 17, 2021

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0 23

Answer : C. 72

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O

Out of 7 consonants and 4 vowels, how many words of 3 consonants and 2 vowels can be formed ?

August 17, 2021

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0 27

August 17, 2021

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0 27

Answer : C. 25200

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