A coin is tossed 25 times and the data is recorded as follows:
Hand 15
Tail 10
The probability is not getting a head is

\frac{1}{2}

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\frac{2}{5}

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\frac{3}{5}

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Solution

The correct option is D $\frac{2}{5}$
The probability to not getting head $= \frac{n o o f p r o b a b i l i t y t o g e t t i n g t h e t a i l}{t o t a l n o o f p r o b a b i l i t y}$
$\Rightarrow \frac{10}{25} = \frac{2}{5}$

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Question 15

A coin is tossed 200 times and head appeared 120 times. The probability of getting a head in this experiment is:

(a) $\frac{2}{5}$

(b) $\frac{3}{5}$

(d) $\frac{4}{5}$

5

2

(a) \frac{5}{16} (b) \frac{5}{32}

(c) \frac{3}{8} (d) \frac{1}{4}

Three coins are tossed 200 times and we get

three heads: 39 times; two heads: 58 times;

one head: 67 times; 0 head: 36 times.

When three coins are tossed at random, what is the probability of getting (i) 3 heads? (ii) 1 head? (iii) 0 head? (iv) 2 heads?

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