Free Daily Targets & Mocks
Study Material & Formulas PDFs
1 on 1 Mentorship
Instructions
Instructions: Study the given information carefully to answer the questions that follows.
An urn contains 4 green, 5 blue, 2 red and 3 yellow marbles.
Question 77
If three marbles are drawn at random, what is the probability that at least one is yellow?
Solution
At least one marble is yellow which means that there can be one yellow marble or two yellow marbles or three yellow marbles.
We know that 0 < probability < 1.
Subtractiong the probability of having no yellow marble gives the probability of having at least on yellow marble.
1 - (11C3/14C3) = 1 - $$\frac{165}{364}$$ = $$\frac{199}{364}$$
Create a FREE account and get:
- Banking Quant Shortcuts PDF
- Free Banking Study Material - (15000 Questions)
- 135+ Banking previous papers with solutions PDF
- 100+ Online Tests for Free
