A survey of 600 students on their preference for coffee was conducted and recorded as shown:

Opinion Like Dislike

No. of students 360 140

Out of these students one is chosen at random. What is the probability that the chosen student
(i) likes coffee?
(ii) dislikes coffee?

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Solution

Total number of students = 600
(i) Number of students who like coffee = 360
Let E₁ be the event that the selected person likes coffee.Then,
P ( selected person likes coffee) = P(E₁) = $\frac{360}{600} = \frac{3}{5}$

(ii) Number of students who dislike coffee = 140
Let E₂ be the event that the selected person dislikes coffee.Then,
P ( selected person dislike coffee) = P(E₂) = $\frac{140}{600} = \frac{7}{30}$ 2560 = 512

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To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table.
$\begin{matrix} Opinion & Number of students like & 135 dislike & 65 \end{matrix}$
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To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table.

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dislike

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Find the probability that a student chosen at random

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Q. In a survey of 100 ladies it was found that 36 like coffee while 64 dislike it.
Out of these ladies, one is chosen at random. What is the probability that the chosen lady (i) likes coffee, (ii) dislikes coffee?

Q. To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table

Opinion	Number of students
Like Dislike	135 65

Find the probability that a student chosen at random
(i) likes statistics,
(ii) does not like it.

Q. To know the opinion of the students about the subject Sanskrit, a survey of 200 students was conducted. The data is recorded as under.

Opinion	like	dislike
Number of students	135	65

What is the probability that a student chosen at random does not like it?

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(b)

\frac{27}{40}

(c)

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A survey of 600 students on their preference for coffee was conducted and recorded as shown: Opinion Like Dislike No. of students 360 140 Out of these students one is chosen at random. What is the probability that the chosen student (i) likes coffee? (ii) dislikes coffee?

A survey of 600 students on their preference for coffee was conducted and recorded as shown:

Opinion Like Dislike

No. of students 360 140

Out of these students one is chosen at random. What is the probability that the chosen student
(i) likes coffee?
(ii) dislikes coffee?