Monday

March 30, 2015

March 30, 2015

Posted by **Anonymous** on Wednesday, February 20, 2013 at 8:38am.

- maths-urgently needed -
**Reiny**, Wednesday, February 20, 2013 at 10:13amN( A or B) = N(A) + N(B) - N(A and B)

let the number of students be x

100% x = 90%x + 85% x - 150

x = .9x + .85x - 150

- .75x = -150

x = 200

There are 200 students in the school

**Answer this Question**

**Related Questions**

Math - In a group of 105 students, 70 students passed Mathematics, 60 students ...

math - In a group of 105 students, 70 students passed Mathematics, 60 students ...

math - out of 100 students in a final examination of class 10, 70 passed in ...

Math - There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class ...

maths - All the students in a school are made to stand in rows so as to form an ...

statistics - In class of 125 students, 70 students passed in Math, 56 students ...

Maths - A school has eleven Year 9 Maths classes of 27 students. Each class has ...

mathematics - 1. In an examination conducted for 80 candidates, those who passed...

probability - A survey of 850 students conducted in two schools showed the ...

venn diagram - IN A CLASS OF 130 STUDENTS.85 PASSED IN MATHS, 60 PASSED IN ...