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Two coins are tossed simultaneously 1000 times with the following frequencies of different outcomes.

Two heads :210 times

One head :550 times

No head :240 times

Find the probability of occurrence of two heads.

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0.21

0.51

3.21

5.21

answer is A.

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Detailed Solution

Given that, two coins are tossed simultaneously 1000 times. Two heads come up 210 times.
Number of times two coins were n(S)

= 1000

.
Number of times two heads comes up n(A)

= 210

.
Probability of an event A is given by,
P(A) =

\frac{Number of favourable outcomes n (A)}{Total number of outcomes n (S)}

The probability of two heads event,

P (A) = \frac{210}{1000}

\Rightarrow P (E) = 0.21

Thus, the probability of two heads is 0.21.
Hence, option 1 is correct.

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