R. D. Sharma Solutions for Chapter: Data Handling – II (Central Values), Exercise 1: EXERCISE

The mean of marks scored by $100$ students was found to be$40 .$ Later on it was discovered that a score of $53$ was misread as$83$. Find the correct mean.

 The mean of five numbers is $27$. If one number is excluded, their mean is $25$. Find the excluded number.

The mean weight per student in a group of $7$ students is $55 \mathrm{kg}$. The individual weights of$6$ of them $(\mathrm{in} \mathrm{kg})$ are $52,54,55,53,56$ and $54$. Find the weight of the seventh student.

The mean weight of $8$ numbers is $15 \mathrm{kg}$. If each number is multiplied by$2,$ what will be the new mean$?$

 The mean of $5$ numbers is $18.$ If one number is excluded, their mean is $16$. Find the excluded number.

The mean of $200$ items was $50$. Later on, it was discovered that the two items were misread as $92$and $8$ instead of $192$ and$88$. Find the correct mean.

The mean of $5$ numbers is $27$. If one more number is included, then the mean is $25.$ Find the included number.

The mean of $75$ numbers is $35$. If each number is multiplied by $4,$ find the new mean.