A teacher is chosen at random. The probability that the teacher is female is 3/5. There are 36 male teachers. How many teachers in total work at the school?

Info given = probability that the teacher is female = 3/5 36 male Teachers

Workings: If 3/5 are female then 2/5 are male. 2/5 = 36 males 36 divided by 2 = 18 so get the one portion. to find out how many women: 18 x 3 (due to probability being 3/5)= 54 total teachers = males + females 54+36 = 90.

SS

Related Maths GCSE answers

All answers ▸

Why can you not divide expressions by common factors?


The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle


Solve the simultaneous equations: 3x + 2y = 4 and 4x + 5y = 17


Complete the square for the equation x^2 - 12x + 8 = 0