Probability -Double dice experiment

When we roll a pair of dice then following 36 outcomes are possible.
A pair of die is rolled. Find the probability of the following.
(i) Getting sum greater than 10.
Solution Total Outcomes = 36
Favourable outcomes = 3 { 6,5 ; 5,6 ; 6,6 }
Required Probability = No. of Favourable Outcomes /Total number of Outcomes
= 3/36
= 1/12
(ii) Getting sum greater or equal to 10.
Solution Total Outcomes = 36
Favourable outcomes = 6 { 6,4 ;5,5 ;4,6 ;6,5 ; 5,6 ; 6,6 }
Required Probability = No. of Favourable Outcomes /Total number of Outcomes
= 6/36
= 1/6
(iii) Getting an even number on the first die
Solution Total Outcomes = 36
Favourable outcomes = 18

Required Probability = No. of Favourable Outcomes /Total number of Outcomes
= 18/36
= 1/2

Congratulations!

Following students of class X C scored full marks in Unit test I.
Best Wishes!

Bag and balls

There are 10 balls in this bag, 4 of them red and 6 blue. I am picking up one ball. Can you say whether it would be red or blue?
The ball drawn may be either red or blue. Since all the balls have an equal chance of being drawn, there is a 4 out of 10 chance that the ball drawn is red and a 6 out of 10 chance that the ball drawn is blue. The probability for the ball drawn to be red is 0.4

The probability for the ball drawn to be blue is 0.6

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