Number System 6.4 x 8.5 x 25/3.2 x 12.5 = ? 5.6 4.5 3.4 2.3 5.6 4.5 3.4 2.3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
Number System A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ? 27/143 28/144 29/145 30/146 27/143 28/144 29/145 30/146 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total balls = 5 + 4 + 4 = 13∴ n(S) = 13C3 = 2862 blue balls can be selected from 4 balls in 4C2 = 6 ways and the remaining one ball is to be selected from 9 balls in 9C1 = 9 ways ∴ n(E) = 6 x 9∴ P(E) = 6 x 9/286 = 27/143
Number System A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is: 24 22 27 30 24 22 27 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 27
Number System Simplify the 121 * 175 + 363 * 275 363000 316600 328100 None of these 363000 316600 328100 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 121 * 175 + 363 * 275 => 121 * 175 + 121 * 3 * 275121 * 175 + 121 * 825= 121 * (175 + 825) = 121000
Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 168 169 170 171 168 169 170 171 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
Number System In a division sum, the remainder is 0. As student mistook the divisor by 12 instead of 21 and obtained 35 as quotient. What is the correct quotient? 20 12 0 13 20 12 0 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number = (12 * 35) = 420Correct quotient = 420/21 = 20
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