Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 382 396 378 343 382 396 378 343 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 21 24 84 42 21 24 84 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
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 ? 37/52 31/58 32/51 34/55 37/52 31/58 32/51 34/55 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 What is 50% of 40% of Rs. 3,450? 640 690 670 630 640 690 670 630 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 40% * 3450 = 1380then, 50 % * 1380 = 690
Number System The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is: 48 84 54 72 48 84 54 72 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72
Number System (2560 x 1.4) +(7400 x 0.6) =? 6543 8024 7234 9160 6543 8024 7234 9160 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8024
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