Question

The probability of an event happening in one trial of an experiment is 0.6. Three independent trial are made. The probability that the event happens at least once is:

• A. 0.432
• B. 0.064
• C. 0.936
• D. 0.568

Answer 1

The correct option is C 0.936

Probability of success in one trial = 0.6
$\therefore$ P (at least one success in 3 trails)
= 1 – P (Failure in all 3 trials)
$=1-(0.4{)}^3=1-0.064=0.936$