Probability of the Same Colour

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?




Similar Riddles

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

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You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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You bought me for dinner but never eat me. What am I?

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What number when divided in half becomes zero?

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There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Find the Mistakes

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Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
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The more you take me, the more you leave me behind.
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In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
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I get hot but I never sweat,
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Amazing Facts

Gambling

In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.