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 ? 32/51 37/52 34/55 31/58 32/51 37/52 34/55 31/58 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 The sum of the digits of a two digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then what will be the original number? 69 59 39 49 69 59 39 49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39
Number System Sum of two numbers is 15. Two times of the first exceeds by 5 from the three times of the other. Then the numbers will be? 7, 8 10, 5 6, 9 9, 6 7, 8 10, 5 6, 9 9, 6 ANSWER DOWNLOAD EXAMIANS APP
Number System Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers? 11, 6 12, 9 10, 5 12, 7 11, 6 12, 9 10, 5 12, 7 ANSWER DOWNLOAD EXAMIANS APP
Number System 4500 * ? = 3375 3/4 2/5 1/4 3/5 3/4 2/5 1/4 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4500 * x = 3375= x = 3375/4500 = 3/4
Number System The difference between two integers is 5. Their product is 500. Find the numbers. 21, 26 15, 20 30, 25 20, 25 21, 26 15, 20 30, 25 20, 25 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.
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