Question

A jar contains 3 red marbles, 7 green marbles and 10 white marbles. if a marble is drawn from the jar at random, what is the probability that this marble is white

Answer 1

Answer:

p=1/2

Step-by-step explanation:

n(s)=7+3+10=20

n(A)=10 //because we find the white marble probability.

p=n(A)/n(s)

p=10/20

p=1/2 Ans

Answer 2

The probability that the marble is white is 1/2

Given :

• A jar contains 3 red marbles, 7 green marbles and 10 white marbles.

• A marble is drawn from the jar at random

To find :

The probability that the marble is white

Solution :

Step 1 of 3 :

Find total number of possible outcomes

The jar contains 3 red marbles, 7 green marbles and 10 white marbles.

Total number of balls

= 3 + 7 + 10

= 20

So total number of possible outcomes = 20

Step 2 of 3 :

Find total number of possible outcomes for the event

Let A be the event that the marble is white

There are 10 white marbles.

So total number of possible outcomes for the event A is 10

Step 3 of 3 :

Find the probability

Hence the required probability

= P(A)

$\displaystyle \sf{ = \frac{Number \: of \: favourable \: cases \: to \: the \: event \: A }{Total \: number \: of \: possible \: outcomes }}$

$\displaystyle \sf{ = \frac{10}{20} }$

$\displaystyle \sf{ = \frac{1}{2} }$

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

1. probability of a 10 year flood occurring at least once in the next 5 years is

https://brainly.in/question/23287014

2. among 21 components 3 are defective. what is the probability that a component selected at random is not defective

https://brainly.in/question/22719974