Number System (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = ? 30.52 29.81 27.54 28.56 30.52 29.81 27.54 28.56 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = 70.84 - 40.32 = 30.52
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 824 625 920 712 824 625 920 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
Number System 486+32×25—59=? 582 528 596 567 582 528 596 567 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 528
Number System √(17)² + (17)² + (5)² - 2 = ? 19 16 17 18 19 16 17 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √49 + 289 + 25 - 2 = √361 = 19
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 56 60 58 54 56 60 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 In how many different ways can the letters of the word 'DETERMINE' be arranged ? 63480 62480 61480 60480 63480 62480 61480 60480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
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