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29 November, 18:50

The sum of n A. M.'s between two numbers is 20. If the last mean is double of the first and one number is three times the other, then find the number

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  1. 29 November, 19:20
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    120

    Step-by-step explanation: because you add 20 twice and thts 40 and 40 times 3 is 120
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