Mathematics 9709/61 — May/June 2011
Cambridge A-Level · Probability & Statistics 1 · worked solutions for every part, with the mark scheme
7
questions
50
marks
75
minutes
Topics Discrete Random Variables · Probability · Permutations and Combinations · The Normal Distribution · Representation of Data
Q14MDiscrete Random VariablesFree sample
Biscuits are sold in packets of 18. There is a constant probability that any biscuit is broken, independently of other biscuits. The mean number of broken biscuits in a packet has been found to be 2.7. Find the probability that a packet contains between 2 and 4 (inclusive) broken biscuits.
The rest of this paper
6 more questions- Q2Probability4M
- Q3Discrete Random Variables6M
- Q4Permutations and Combinations8M
- Q5The Normal Distribution8M
- Q6Representation of Data10M
- Q7Probability10M
Loading the full paper…