Hi everyone,

Topic: Overlapping Sets and Multiplication Principle & Permutations Combinations

Sub topic: Overlapping sets

Link to video: Last question in the video

Here in this question, you can see that Greg uses the percentage values in the variables for ‘a’ through ‘f’ and sums them up to 150 (which is the number, not a percentage)

My doubt is, shouldn’t we have calculated a = (0.60 *150), b = (0.30 * 150) … and so on before proceeding to solve the question?

So the solution would be

let d+e+f = Z

a=0.60 *150 = 90, b = 0.50* 150 = 75, c = .30 * 150 = 45

a+b+c - Z = 150 - (5+5)

Z = (90+75+45) - 140 = 210 - 140 = 70

Thanks,

Anshuman.