a boy perform 5 times a reaction and his reading are 2,2.1,2,2.2 but unfortunately
5th reading clearly not visible because a drop of chemical fall onto it.but luckily he
have mean of all reading which is 2.please help him in finding 5th reading. Choices
A) 2	B) 1.7	C) 1.9	D) 1.8	E) 2.1
solution   let 5th reading be x   (2+2.1+2+2.2+x)/5=2   8.3+x=10   x=1.7   answer 1.7
<result>B</result>
a boy perform 5 times a reaction and his reading are 2,2.1,2,2.2 but unfortunately
5th reading clearly not visible because a drop of chemical fall onto it.but luckily he
have mean of all reading which is 2.please help him in finding 5th reading.