Question

how to find average 230 when first number is 180, second is 275 and third no is not given
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Answer 1

Answer:

Let , the 3rd is X

then ,

$\frac{180 + 275 + x}{3} = 230 \\ or \: 455 + x = 230 \times 3 \\ or \: x = 690 - 455 = 235$

Hope it helps . Please make me brainliest ......