The mean of numbers obtained on throwing a die having written 1 on three faces, 2 on two faces and 5 on one face is :
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 2
1 → 3 faces, 2 → 2 faces, 5 → 1 faces
mean of numbers by faces
$=\frac{∑(No.\,of\,each\,face)}{No.\,of\,faces}=\frac{1+1+1+2+2+5}{6}$
$=\frac{12}{6}=2$