Binomial Distribution - Examples

Now I look at using the formula in solving the following questions. You may like to try these before looking at the tutorial and worked solution.


The manufacturer of a bag of sweets claims that there is a 90% chance that the bag contains some toffees. If 20 bags are chosen. What is the probability that

(i) all the bags contain toffees

(ii) more than 18 bags contain toffees


In clinical trials a certain drug has an 8% success rate of curing a known disease. If 15 people are known to have the disease. What is the probability of at least 2 being cured.

My site is still free after 8 years but if you can support my time and running costs by making a donation I will write to you personally to thank you.

Like my work? please share

facebook google+ twitter

General Tutorial Index

Get the ExamSolutions Apps for iOS / Android

Free trial

Download videos

View later when offline.

See video for more details ...

Apple App Store

Get it on Google Play

ExamSolutions App

Hertfordshire Web Design