Number System What should come in place of question mark (?)? 8 : 1 1 : : 72: 109 89 79 99 109 89 79 99 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let ? = xTherefore 8 : 11 : 72 : xTherefore x = (11 x 72) / 8 = 99
Number System (4 86%of 6500) ÷ 36 =? 677.5 777.5 877.5 977.5 677.5 777.5 877.5 977.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 877.5
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 91 86 94 97 91 86 94 97 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
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 ? 51/340 39/340 58/340 45/340 51/340 39/340 58/340 45/340 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 The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: 30 20 40 None of these 30 20 40 None of these ANSWER DOWNLOAD EXAMIANS APP
Number System How many numbers up to 100 and 300 are divisible by 11? 20 22 21 18 20 22 21 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (300 – 100)/11 = 200/11 = 18 2/1118 Numbers
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