Q1. A school has 4 sections of Chemistry in Class X having 40 35 45 and 42 students The mean marks obtained in Chemistry test are 50 60 55 and 45 respectively for the 4 sections Determine the over all average of marks per student

Q2. The average age of 19 students is 19 If the age of teacher is included the average become 20 Find the age of teacher

Q3. The average marks secured by 15 students are 70 and later it was found that one entry is wrong and 65 is written instead of 45 Find out he corrected average

Q4. The average of 7 consecutive numbers is 20 The largest of these numbers is

Q5. The average of runs of a cricket player of 10 innings was 32 How many runes must be made in his next innings so as to increase his average of runs by 4