20 A ball is drawn from a box containing 6 red balls,4 white balls and 5 black balls. Determine the probability that it is not red is,
Answers
Given :-
A ball is drawn from a box containing 6 red balls,4 white balls and 5 black balls
To Find :-
Probability of not red
Solution :-
Total outcomes = Red balls + White balls + Black balls
Total outcomes = 6 + 4 + 5
Total outcomes = 15
Now
Total balls (not including red) = 4 + 5
Total balls (not including red) = 9
Now
Probability = Favourable outome/Total outcomes
Probability = 9/15
Probability = 3/5
[tex][/tex]
Solution :
As per the details mentioned in the question
• A ball is drawn from a box containing 6 red balls , 4 white balls and 5 black balls .
We need to find the probability that the ball drawn is not red .
First, let us discover the sample space for this .
Sample Space - Total number of balls
> 6 red balls + 4white balls + 5 black balls
> 15 balls .
Number of favourable cases when the ball isn't red -
> Total number of balls - Number of red balls
> 15 - 6
> 9 balls .
Required probability -
> Favourable Cases/ Sample space
> 9/15
> 3/5
> 0.6
Answer - The probability that the ball drawn isn't red is 0.6
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