the avarge of three numbers is 8 . the first two number are 5 and 12 find the third number ?
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Answer:
Step-by-step explanation:
Average = sum÷no.of numbers
17+x(the missing no.) ÷3 = 8
17+x÷3 = 8
Shifting +17 to right hand side
x÷3 = 8-17
x÷3 = 9
Shifting ÷3 to right hand side
x = 9÷3
x = 3
Third number is 3
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