Question

The average of 1, 2, x, 4 and 5 is 3. Find the value of x.​

Answer 1

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$\boxed{avrage = \frac{sum \: of \: all \: outcome}{totel \: no. \: of \: outcome} } \\ \\ \rightsquigarrow \: \frac{1 + 2 + x + 4 + 5}{3} = 3 \\ \rightsquigarrow \: \frac{12 + x}{3} = 3 \\ \rightsquigarrow \: 12 + x = 3 \times 5 = 15 \\ \rightsquigarrow \: x = 15 - 12 = 3 \\ \\ x = 3$

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Answer 2

Answer:

The average of 1,2,x,4 and 5 is 3. find the value of x