Rahul's average mark in four subjects is 70, and his average mark in his other two subjects is 85. What is his average mark across all six subjects?

Explanation

1. 01

   Marks in the four subjects = $4 \times 70 = 280$.

2. 02

   Marks in the two subjects = $2 \times 85 = 170$.

3. 03

   Average = $\frac{280 + 170}{6} = \frac{450}{6} = 75$.