The average of all prime numbers 21 to 50 is (round off to one decimal number) 

Answer the following questions

In an exam of 100 marks, the average marks of a class of 40 students are 76. If the top 3 scorers of the class leave, the average score falls “down by 1. If the other two toppers except “the highest topper scored not more than 85. “then what is the minimum score the topper can score?

Answer the following questions

There are three numbers in such a way that the average of the first and second numbers is 68 more than the average of the second and third number. Find the difference between first and the third number.

The average age of five girls is 11. The oldest among them is 15 years old. What is the average age of the others?

Sunil has 40 coins of 10 paise and 25 paise each. If he has Rs 7.75, then how many 10 paise coins are there?

30 oranges and 75 apples were purchased for Rs 510  If the price per apple was 2 then the average price of orange was?

The average marks of the students of a class is 68. The average marks of girls in the class is 80 and that of boys is 60. What percentage of students are boys in the class?

The average score of 14 students was calculated as 71. But later it was found that marks of one student were recorded as 42 instead of 56 and as 74 instead of 32 of the other. Correct average?