Number System When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 550 850 650 750 550 850 650 750 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
Number System A bag contains four red, six black and seven green balls. Three balls are drawn randomly. What is the probability that the balls drawn contain exactly two red balls ? 51/340 39/340 58/340 45/340 51/340 39/340 58/340 45/340 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total balls = 4 + 6 + 7 = 17∴ n(S) = 17C1 = 680Two red balls can be selected from four red balls in 4C2 = 6 ways.and the third ball can be selected from the remaining 13 balls in 13C1 = 13 ways.∴ P (E) = 13x6/680 = 39/340
Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 62480 63480 61480 60480 62480 63480 61480 60480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
Number System Two numbers are in the ratio 3:5. If 9 be subtracted from each, they are in the ratio of 9:17. The first number is: 30 27 18 36 30 27 18 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (3x-9):(5x-9) = 9:17 x = 12 => 3x = 36
Number System What is 25/2% of 482 times of 183 ? 11025.75 11050.75 12025.50 12025.75 11025.75 11050.75 12025.50 12025.75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 25/2% of [482 x 183]= 25/2% of 88206= 25/2 x 88206 / 100= 88206 / 8= 11025.75
Number System 1827÷ 36 x ?=162.4 2.6 3.2 1.9 4.3 2.6 3.2 1.9 4.3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3.2
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