Number System {(742)² ÷ 36} ÷ 2 = ? 420.5 423.5 421.5 422.5 420.5 423.5 421.5 422.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System An urn contains 9 blue, 7 white and 4 black balls. If 2 balls are drawn at random, then what is the probability that only one ball is white ? 91/190 92/190 90/190 89/190 91/190 92/190 90/190 89/190 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total possible outcomes = 20C2 = 20 x 19/1 x 2 = 190Total favourable outcomes = 7C1 x 13C1 = 7 x 13 = 91∴ Required probability = 91/190
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 4 15 5 7.5 4 15 5 7.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System 74698 + 365 + 85213 + 95 = ? 160341 160351 160371 160361 160341 160351 160371 160361 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 74698 + 365 + 85213 + 95 = 160371
Number System A number exceeds by 25 from its 3/8 part. Then the number is? 40 32 39 35 40 32 39 35 ANSWER DOWNLOAD EXAMIANS APP
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