Number System On converting the following base-2 numeral in base ten, 1101101, we get 107 109 106 108 107 109 106 108 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 109
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 ? 92/190 90/190 89/190 91/190 92/190 90/190 89/190 91/190 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 basket contains 5 blue, 4 green and 3 red ball. If three balls are picked at random, what is the probability that at least one is red ? 31/58 32/51 34/55 37/52 31/58 32/51 34/55 37/52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Probability of having no red ball is9C3 / 12C3 = 21/55Probability of having at least one red ball is 1 - 21/55 = 34/55
Number System 384×12×2=? 8465 7487 6123 9216 8465 7487 6123 9216 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9216
Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 26 23 25 24 26 23 25 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23
Number System 217 * 217 + 183 * 183 = ? 81268 79698 80698 80578 81268 79698 80698 80578 ANSWER DOWNLOAD EXAMIANS APP
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