How many four digit numbers can be made by using exactly three different digits among the digits 4 5 6

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Previous Question: Four people attended a party. Each of them brought along his ipod and kept it on a desk when he arrived at the party. One of them got a call and left the party in a hurry. While leaving, the person picked one of the ipods at random and left. From the second person onwards, each person picked his ipod, if it was there on the desk, else he picked up an ipod at random and left. What is the probability that the last person leaving the party will get his own ipod?(1) 5/12 (2) 13/24 (3) 1/4 (4) 1/2At least One approach

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How many four-digit numbers can be made by using exactly three different digits among the digits 4, 5, 6 and 7?

1) 156
2) 124
3) 132
4) 144
5) 120: Asked In MBA (11 years ago); Unsolved Read Solution (1); Is this Puzzle helpful? (0) (1) Submit Your Solution

Dimple

India

Punjab

Time: 00:01:33

Points

Six is a number perfect in itself, and not because God created the world in six days; rather the contrary is true. God created the world in six days because this number is perfect, and it would remain perfect, even if the work of the six days did not exis

Saint Augustine of Hippo

God does not care about our mathematical difficulties; He integrates empirically.

Albert Einstein

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