Find the value of x if the average of 1.0, 0.8, 0.2 and x is exactly 0.6?
- 0.4
- 0.2
- 2.4
- 0.66
- None of these
Explanation
For 4 numbers to average 0.6, the sum of the numbers must equal 4(0.6)=2.4
1.0+0.8+0.2+x=2.4
2.0+x=2.4
x=0.4
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