Question

Q1. A bag contain 3 red, 4 white 5 black and 3 green balls. A ball is
drawn from the bag. Find the probability of getting
a. A white ball
b. A red ball​

Answer 1

Answer:

(a) no. Of white balls /

Total no. Of balls

=4/15

(b) no. Of red balls /

Total no. Of balls

=3/15

=1/5

Answer 2

Given:-

• Number of Red balls is 3.

• Number of White balls is 4.

• Number of Black balls is 5.

• Number of Green balls is 3.

To Find:-

• If a ball is drawn from the bag find the:-

• Probability of getting a white ball.

• Probability of getting a red ball.

Solution:-

Here, Number of total balls is 3 + 4 + 5 + 3 = 15 balls

Since, A ball is drawn from the bag then the probability of getting a white ball is :-

S(n) = 4

P(W) = $\dfrac{4}{15}$

Now, A ball is drawn from the bag then the probability of getting a red ball is :-

S(n) = 3

P(R) = $\dfrac{3}{15}$     = $\dfrac{1}{5}$

Hence,

• Probability of getting a white ball is $\dfrac{4}{15}$ .

• Probability of getting a red ball is $\dfrac{1}{5}$ .

Some Important Terms:-

•   Probability is a concept which numerically measures the degree of certainty of the occurrence of events.

• Probability of any experiment will be  0 ≤ P ≥ 1.

• If the probability is 0 then the experiment is impossible event.

• If the probability is 1 then the experiment is sure event.

• Summation of all events probability will be 1.