Number System Find the least value of 3x + 4y if x2y3 = 6. 6 10 3 7 6 10 3 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System 5358 * 51 = ? 273268 273258 273348 273358 273268 273258 273348 273358 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5358 * 51 = 5358 * (50 + 1) = 5358 * 50 + 5358 * 1= 267900 + 5358 = 273258
Number System A basket contains eight white and ten black balls. Two draws of one ball each are made without replacement. What is the probability that one ball is white and the other ball is black ? 80/150 80/153 80/152 80/151 80/150 80/153 80/152 80/151 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Two balls can be drawn from 18 balls in 18C2 Ways, ie 153 ways. One white from 8 white balls can be drawn in 8C1 = 8 ways and one black ball from 10 black can be drawn in 10C1 = 10 ways.∴ n(S) = 153, n(E) = 8 x 10 = 80∴ P(E) = 80/153
Number System 36% of 850+? % of 592 = 750 50 75 25 12.5 50 75 25 12.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 5 7 3 11 5 7 3 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 25xy = 144(x- y)2 = (x + y)2 – 4xy(x- y)2 = 625 – 576 => (x – y) = 7
Number System What is 50% of 40% of Rs. 3,450? 630 690 640 670 630 690 640 670 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 40% * 3450 = 1380then, 50 % * 1380 = 690
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