Question

Out of $500$ oranges in a box,$\frac{3}{25}$ are rotten and $\frac{1}{5}$ are kept for some guest.How many oranges are left in the box?

Answer 1

Number of oranges$=500$

Bad oranges$=\frac{3}{25}$ of $500=\frac{3}{25}\times 500=60$

Kept for guests$=\frac{1}{5}$ of $500=\frac{1}{5}\times 500=100$

$\therefore$Number of oranges which can be used$=500-60-100=500-160=340$