Number System 16.23 x 12.9 + 17.32 = ? None of these 246.687 226.687 236.687 None of these 246.687 226.687 236.687 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687
Number System What is the sum of all the prime numbers from 20 to 40? 119 120 117 118 119 120 117 118 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System ?125÷5x ?=6265 1253 124 1452 153 1253 124 1452 153 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1253
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 80/152 80/153 80/150 80/151 80/152 80/153 80/150 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
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 78 77 75 76 78 77 75 76 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System Two-third of a positive number and 25/216 of its reciprocal are equal. The number is: 12/5 144/25 25/144 5/12 12/5 144/25 25/144 5/12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,2/3 x = 25/216 * 1/xx2 = 25/216 * 3/2 = 25/144 x = 5/12
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