Arun Sharma Solutions for Exercise 1: Level of Difficulty

$40$ oranges and $65$ apples were purchased for $₹480$. If the price per apple was $₹4$, then the average price of oranges was (in $₹$)

The average income of Aditya and Vikas is$₹4,000$ and that of Sudhir and Raunak is$₹2500$. What is the average income of Aditya, Vikas, Sudhir and Raunak (in$₹)$?

A batsman made an average of $55$ runs in $4$ innings, but in the fifth inning, he was out an zero. What is the average after the fifth inning?

The average weight of $50$ teachers of a school is $70 \mathrm{kg}$. If, however, the weight of the principal be included, the average decreases by $0.5 \mathrm{kg}$. What is the weight of the principal?        

The average temperature of $4\mathrm{th}, 5\mathrm{th}$ and $6\mathrm{th}$ December was $25.6°\mathrm{C}$. The average temperature of the first two days was $27°\mathrm{C}$. The temperature on the $6\mathrm{th}$ of the December was

The average age of Gita and Sita is $30$ years. Their average age $4$ years hence will be

The average temperature on Monday, Tuesday and Wednesday was $52{}^{\circ }\mathrm{C}$ and on Tuesday, Wednesday and Thursday it was $50{}^{\circ }\mathrm{C}$. If on Thursday it was exactly $49{}^{\circ }\mathrm{C}$, then on Monday, the temperature was

Sachin has a batting average of $40$ runs per innings in $15$ ODIs. It was found that in the $2$ ODI match series against South Africa(which were part of his first $15$ ODIs), his average score was $40$ and not $80$. His correct average is