Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1120 1180 1160 1140 1120 1180 1160 1140 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
Number System The difference between two integers is 5. Their product is 500. Find the numbers. 20, 25 30, 25 15, 20 21, 26 20, 25 30, 25 15, 20 21, 26 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the integers be x and (x + 5). Then, x(x + 5) = 500 x2 + 5x - 500 = 0 (x + 25)(x - 20) = 0 x = 20So, the numbers are 20 and 25.
Number System A bag contains four red, six black and seven green balls. Three balls are drawn randomly. What is the probability that the balls drawn contain exactly two red balls ? 45/340 58/340 51/340 39/340 45/340 58/340 51/340 39/340 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total balls = 4 + 6 + 7 = 17∴ n(S) = 17C1 = 680Two red balls can be selected from four red balls in 4C2 = 6 ways.and the third ball can be selected from the remaining 13 balls in 13C1 = 13 ways.∴ P (E) = 13x6/680 = 39/340
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 10 6 5 4 10 6 5 4 ANSWER DOWNLOAD EXAMIANS APP
Number System 4/6 of 6/5 of 5/7 of a number is 96. Find the number. 170 162 168 164 170 162 168 164 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 4/6 x 6/5 x 5/7 = 96∴ x = 96 x 6 x 5 x 7/4 x 6 x 5 = 168
Number System Complete the series : 11, 12, 17, 18, 23, 24 ... 12 30 None of these 14 12 30 None of these 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP None of these
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