A bag contains 12 bals of different colours: 5 red, 4 blue and 3 yellow. What is the probability of not selecting a red ball
The probability of an event not happening is 1 minus the probability of the event happening. Five of the twelve balls are red so the probability of selecting a red ball is 5/12. The probability of not selecting a red ball is 1 - 5/12. Find a common denominator in order to calculate this subtraction: 1 - 5/12 = 12/12 - 5/12 = 7/12.
LD
Related Maths GCSE answers
All answers ▸Work out the value of (16/81)^(3/4)
A linear sequence starts with: a + 2b ; a + 6b ; a + 10b etc. The 2nd term has value 8. The 5th term has value 44. Work out the values of a and b.
Why do the denominators have to be equal when adding fractions, but not when multiplying them?
Solve the simultaneous equations: (3x+2y=3), (x-y=-4)