Haryana Police Constable Model Paper 9

Question : 45 of 100

Marks: +1, -0

Ruchi tosses 3 coins in the air. Calculate the probability of getting one tail among the tossed coins.

$1/4$
$3/8$
$1/8$
$1/2$

Solution:

\text "Probability "= {\text "Total number of outcomes"}/{\text "Sample space"}

Sample space = {(TTT), (HHH), (THH), (HTH), (HHT), (TTH), (THT), (HTT)}
⇒ Sample space = 8
⇒ Number of possible outcomes = {(THH), (HTH), (HHT)}
⇒ Number of possible outcomes = 3
∴ probability is

3/ 8

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