Question

5. (a) Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes :
Outcomes 3 heads 2 heads 1 head 3 tails
Frequency I 23 | 84 | 71 | 22 Respectively
Find the probability of getting
(i) 3 heads
(ii) No heads
(iii) at least two heads​

Answer 1

Answer:

The probability of tossed three coins.

n(s)={HHH, HHT, HTH, HTT, TTT, THH, THT, TTH}

P(s)={ 8}

The A probability of 3 heads

n(A)={ HHH}

p(A)={1}

p(A)=n(A)/n(s)

= 1/8

B the event no heads

n(B)={TTT}

=[1]

1/8

C the event at least two heads

n(c)={HHH, HTH,HHT ,THH,}

=(4)

= 4/8

n(c)=1/2