Question

Three friends, Rohan, Rahul, and Sam have a stamp collection. There are $23$ stamps in Rohan's collection, $36$ stamps in Rahul's collection, and $20$ stamps in Sam's collection. What is the total number of stamps with them ?

• A. $69$
• B. $56$
• C. $79$
• D. None of the above

Answer 1

The correct option is C $79$

Number of stamps with Rohan = $23$
Number of stamps with Rahul = $36$
Number of stamps with Sam = $20$

$\therefore$ Total number of stamps = $($ $23$ $+$ $36$$)$ $+$ $20$ $=$ $23$ $+$ $($ $36$ $+$ $23$ $)$ $=$ $79$