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 ? 90/190 91/190 92/190 89/190 90/190 91/190 92/190 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 A number exceeds by 25 from its 3/8 part. Then the number is? 32 40 35 39 32 40 35 39 ANSWER DOWNLOAD EXAMIANS APP
Number System Supply the missing figure : 2, 6, 12, 20, 30 ... 56 42 41 40 39 42 41 40 39 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
Number System The average of 7 consecutive even numbers A, B, C, D, E, F and G is 36. What is the product of ' C and 'E' ? 1168 1468 1327 1292 1168 1468 1327 1292 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E + F + G/7 = 36Therefore, D = 36Therefore, C = 34, E = 38Therefore, Product = 34 x 38 = 1292
Number System 1051.64 - 159.42 - 96.84 + 162.37 - 940.26 + 504 = ? 501.49 511.49 521.49 491.49 501.49 511.49 521.49 491.49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1718.01 - 1196.52 = 521.49
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