Number System If the product of two successive positive integers is 4692, what is the smaller number ? 66 70 64 68 66 70 64 68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∵ 68 x 69 = 4692
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 45 360 48 36 45 360 48 36 ANSWER DOWNLOAD EXAMIANS APP
Number System Find the least number which when divided by 35 and 11 leaves a remainder of 1 in each case. 386 388 391 384 386 388 391 384 ANSWER DOWNLOAD EXAMIANS APP
Number System ind the number, difference between number and its 3/5 is 50 120 124 123 125 120 124 123 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number = x,Then, x-(3/5)x = 50,=> (2/5)x = 50 => 2x = 50*5,=> x = 125
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 60 56 54 58 60 56 54 58 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.
Number System A basket contains eight white and ten black balls. Two draws of one ball each are made without replacement. What is the probability that one ball is white and the other ball is black ? 80/151 80/150 80/152 80/153 80/151 80/150 80/152 80/153 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Two balls can be drawn from 18 balls in 18C2 Ways, ie 153 ways. One white from 8 white balls can be drawn in 8C1 = 8 ways and one black ball from 10 black can be drawn in 10C1 = 10 ways.∴ n(S) = 153, n(E) = 8 x 10 = 80∴ P(E) = 80/153
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