Number System Find the least value of 3x + 4y if x2y3 = 6. 3 6 7 10 3 6 7 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is 640 725 750 775 640 725 750 775 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Failed students are 32% which is 248.∴ Total = 24800/32 = 775
Number System In how many different ways can the letters of the word TEST' be arranged ? 16 10 12 8 16 10 12 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System Which number should replace question mark (?) in the following equation ? ?/342 = 38/? 114 112 118 116 114 112 118 116 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 342 x 38Therefore, ? = √342 x 38 = √38 x 9 x 38 = 38 x 3 = 114
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 60 56 58 54 60 56 58 54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.
Number System If the difference between a number and its 2/5 is 240, find the number. 440 480 400 360 440 480 400 360 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
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