M L Aggarwal Solutions for Chapter: Statistics, Exercise 6: Very Short Answer Questions

Noori scored $14, 16, 13$ and $19$ marks (out of $20$) in Mathematics in weekly unit tests of a month. If the mean of marks scored by her is $k$, find $k$ in decimal number.

If the arithmetic mean of the first six natural numbers is $k$, find $k$ in decimal number.

Find the mean of the first seven multiples of $4$.

If the mean of $8$ given numbers is $35$, then find their sum.

If the mean of the prime factors of $24$ is $k$, find $k$ in a decimal number.

If the mean of $3, 5, 0, 9, x, 7$ and $13$ is $7$, then find the value of $x$.

The mean of $8$ observations is $25$. If an observation $18$ is removed, then find the mean of the remaining observations.

If the mean of six observations is $10.5$ and five of them are $13, 5, 7, 9$ and $14$, then find the sixth observation.