A bag contains 40 balls coloured as red, blue and black. If P(red) = 11/20 and P(blue) = 1/5, P(black)=?

1/4

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

2/3

No worries! We‘ve got your back. Try BYJU‘S free classes today!

4/5

No worries! We‘ve got your back. Try BYJU‘S free classes today!

13/20

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A 1/4

Suggest Corrections

Similar questions

Q. A bag contains 40 balls out of which some are red, some are blue and remaining are black. If the probability of drawing a red ball is

\frac{11}{20}

and that of blue ball is

\frac{1}{5}

, then the number of black ball is?

A bag contains 11 black, 8 blue, 5 red and 6 yellow balls. If 10 green balls are now added to the bag , find the percentage of blue balls in the bag.

Q. Bag A contains

3

Red Marbles and

4

Blue Marbles.
Bag B contains

5

Red Marbles and

3

Blue Marbles.
A marble is taken from each bag in turn. What is the probability of getting a marble of each colour?

Q. A bag contains

8

red balls,

11

blue balls and

6

green balls. Find the percentage of blue balls in the bag.

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that a red ball, find the number of blue balls in the bag.

Join BYJU'S Learning Program