The average of 6 observations is 14. A new observation is included and the new average is decreased by 1. The seventh observation is? Choices:
A) 1 B) 3 C) 5 D) 6 E) 7
Let seventh observation = X.   Then, according to the question we have   =&gt; (84 + X) / 7 = 13   =&gt; X = 7.   Hence, the seventh observation is 7.   ANSW7R:7
<result>E</result>
The average of 6 observations is 14. A new observation is included and the new average is decreased by 1. The seventh observation is?