Question

From set of 30 numbers , the average first 10 numbers is equal to average of first 20 numbers then find the sum of first 10 numbers

Answer 1

Answer:

okay

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huhhuhuhuh

Answer 2

$\sf\huge\bold\pink{Answer:}$

total=30

1st averageof 10=20 numbers

$sum = \frac{n}{2} (2a + (n - 1)d) \\ = 5(2 + (10 - 1)2) \\ = 5(2 + 18) \\ = 5(20) \\ = 100$