Question

coin is tossed 80 times and the head is obtained 38 times. Now, if a coin is tossed once,
what will the probability of getting :
() a tail
(ii) a head​

Answer 1

Answer:

(a) 1/2 and (b) 1/2

Step-by-step explanation:

Because it was asking that now if a coin is tossed once,

So

(a) Probability of getting a head when tossed once =1/2

(b) Probability of getting a tail when it is tossed once=1/2

Answer 2

A coin is tossed 80 times and the head is obtained 38 times. Now, if a coin tossed once, what will the probability of getting:

(i) a tail

(ii) a head

Solution:

(i) Total number of outcomes = 80

and, the number of favourable outcomes of getting a tail = 80 - 38 = 42

Probability of getting a tail = P(E)=\frac{Total\ number\ offavourable\ outcomes}{Total\ number\ ofoutcomes}P(E)=

Total number ofoutcomes

Total number offavourable outcomes

=\frac{42}{80}=\frac{21}{40}=

80

42

=

40

21

(ii) Total number of outcomes = 80

and, the number of favourable outcomes of getting head = 38

∴ Probability of getting a head = (E)=\frac{Total\ number\ offavourableoutcomes}{Total\ number\ ofoutcomes}(E)=

Total number ofoutcomes

Total number offavourableoutcomes

=\frac{38}{80}=\frac{19}{40}=

80

38

=

40

19