A bag contains 5 red balls, 6 yellow balls and green ball. If two balls are picked at random what is the probability that either both are red or both are green in colour?

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IBPS-MOCK TEST 1
MOCK TEST 1
Q:186

3/7

5/14

1/7

2/7

Explanation:

Self-Explanatory

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If a 140 L of mixture of milk and water, percentage of water is only 30%. The milkman gave 20 L of this mixture to a customer. Then he added equal quantities of pure milk and water to the remaining mixture. As a result the respective rartio of milk and water in the mixture became 2 : 1. What was the quantity of milk added?

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