Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 54 60 56 58 54 60 56 58 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 (1024—263—233)÷(986—764— 156) =? 8 None of these 6 10 8 None of these 6 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 76 77 78 75 76 77 78 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System 2536+4851—?=3450+313 4567 5243 3624 6784 4567 5243 3624 6784 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3624
Number System A, B, C, D and E are consecutive even numbers respectively. The average of 5 numbers is 82. What is the product of C and E ? 6353 6363 6383 6373 6353 6363 6383 6373 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + x + 1 + x + 2 + x + 3 + x + 4 = 5 x 82= 5x + 10 = 410 = 5x = 400= x = 400/5 = 80 ∴ A = 80C = 82and E = 84= C x E = 82 x 84 = 6383
Number System (2560 x 1.4) +(7400 x 0.6) =? 6543 9160 7234 8024 6543 9160 7234 8024 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8024
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