For the given five values 12, 16, 20, 30, k, the three years moving averages are 16, 22, 28, then the value of k is :
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 34
First moving average,
$\frac{12+16+20}{3}=16$
$\frac{48}{3}=16$
$16=16$
Second moving average,
$\frac{16+20+30}{3}=32$
$\frac{66}{3}=12$
Third moving average,
$\frac{20+30+k}{3}=28$
$k=34$