Question

Three coins are tossed simultaneously 350 times. The distribution of various
outcomes is listed below :
Outcome 3 Tails 2 Tails 1 Tail No Tails
No. of times 65 95 110 80
Compute the probability of getting:
(i) At least 1tail (ii) Exactly 3 heads

Answer 1

Answer:

Hi friend ,

(i) P( three tails)= No. of times tail came up/ Total no. of toe coin is tossed.

P( three tails)= 5/350= 1/70

(ii) P (two tails) = 95/350

= 19/70

(iii) P( one tail) = 120/350

= 24/70

(iv) P(no tails)= 80/350

=16/70

Adding up all the probabilities:

1/70+19/70+24/70+16/70

60/70 is not equal to 1. So these outcomes are wrong.

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Hope this helped u..

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