Look at this series: 201, 202, 204, 207, ... What number should come next?
Options:
(A) 211
(B) 205
(C) 224
(D) 267
(E) 269
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In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on. So the answer is: (A).
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In 2 bags, there are to be put together 5 red and 12 white balls, neither bag being empty. How must the balls be divided so as to give a person who draws 1 ball from either bag-
Options:
(A) 9/18
(B) 9/16
(C) 9/11
(D) 9/12
(E) 9/13
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(1) Put 1 white in first bag, and all the remaining ball in second bag. Probability = 120+12516120+12516 = 532532
(2) To maximize, we put 1 red in the first bag, and all the remaining in the second. Probability = 121+12432121+12432 = 9/16 So the answer is: (B).
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An design manager has 10patterns of chairs & 9patterns of tables. In how many ways can he make a pair of table & chair?
Options:
(A) 20
(B) 40
(C) 80
(D) 90
(E) 100
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He has has ten patterns of chairs and eight patterns of tables
Hence, A chair can be arranged in 10 ways and
A table can be arranged in 9 ways
Hence one chair and one table can be arranged in 10 x 9 ways = 90 ways So the answer is: (D).
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