In a class of 70 students,30 play football only,20 play both football and basketball and 10 play neither football nor basketball. How many students play basketball?

To find out how many students play basketball, we need to subtract the number of students who play only football and those who play both football and basketball from the total number of students.

Total number of students = 70
Number of students who play only football = 30
Number of students who play both football and basketball = 20

To find the number of students who play basketball, we can use the formula:

Number of students who play basketball = Total number of students - Number of students who play only football and basketball - Number of students who play only football

Number of students who play basketball = 70 - 20 - 30
Number of students who play basketball = 20

Therefore, there are 20 students who play basketball.

To find out how many students play basketball, we need to subtract the number of students who do not play basketball from the total number of students.

Let's break down the given information:
- The total number of students in the class is 70.
- 30 students play only football.
- 20 students play both football and basketball.
- 10 students play neither football nor basketball.

To find the number of students who play basketball, we need to subtract the number of students who do not play basketball from the total number of students:

Total number of students - Number of students who do not play basketball = Number of students who play basketball

So, to calculate the number of students who play basketball:

70 - (30 + 10) = 70 - 40 = 30

Therefore, there are 30 students who play basketball.

If x play basketball only, then 20+x play basketball

30+20+x = 70-10
20+x = 30