Probability ncert solutions Chapter 15 Exercise 15.1 Question 19
19. A child has a die whose six faces show the letters A, B, C, D, E and A.
The die is thrown once. What is the probability of getting (i) A? (ii) D?
Solution
(i)
Let E be the event of getting A with a single throw of dice.
Number of possible outcomes favorable to event E=2
(There are 2 faces on a dice with A written on them)
Total number of possible outcomes=6 (There are 6 faces on a dice)
P(E)=(Number of outcomes favorable to event E)/(Total number of possible outcomes)
(ii)
Let F be the event of getting D with a single throw of dice.
Number of possible outcomes favorable to event F=1
(There is 1 face with letter D on it)
Total number of possible outcomes=6 (There are 6 faces on a dice)
P(F)=(Number of outcomes favorable to event F)/(Total number of possible outcomes)
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