CAT Exam

there is 200 coins.there is two boxes.how to fill the two boxes with 2:1 ratio

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CAT Other Question

A shop stores x kg of rice. The first customer buys half this amount plus half a kg of rice. The second customer buys half the remaining amount plus half a kg of rice. Then the third customer also buys half the remaining amount plus half a kg of rice. Thereafter, no rice is left in the shop. Which of the following best describes the value of x?
A. 2 ≤ x ≤ 6
B. 5 ≤ x ≤ 8
C.9 ≤ x ≤12
D. 11≤ x ≤ 14
There are 4 white balls and 5 black balls.3 balls are drawn at random.What is probability of odds against all black