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 of $15$ results is $20$ out of which the first $5$ results are having an average of $10$. The average of the rest $10$ results is