Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2410 2520 2367 2678 2410 2520 2367 2678 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System 0.333 .... × 0.444 .... is equal to 1.333 .... 0.148148148 .... 0.121212 .... 0.777 .... 1.333 .... 0.148148148 .... 0.121212 .... 0.777 .... ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.148148148 ....
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 ? 58/340 45/340 51/340 39/340 58/340 45/340 51/340 39/340 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 The number of prime factors of (6)10×(7)17×(55)27 61 41 91 101 61 41 91 101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 91
Number System Sum of two numbers is 80. Greater number exceeds by 5 from four times of the smaller. Find the numbers? 64, 16 65, 15 62, 18 60, 20 64, 16 65, 15 62, 18 60, 20 ANSWER DOWNLOAD EXAMIANS APP
Number System 3251 + 587 + 369 - ? = 3007 1200 1375 1250 1300 1200 1375 1250 1300 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 4207 - x = 3007 Then, x = 4207 - 3007 = 1200
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