Practicing Success
Read the text carefully and answer the questions : Three persons A, B and C were given a task, whose probabilities of completion their task on time are $\frac{1}{3}, \frac{1}{4}$ and $\frac{1}{5}$ respectively. They were asked to complete the task on time independently. |
The probability that task is completed on time by at least one of them is: |
$\frac{2}{5}$ $\frac{3}{20}$ $\frac{3}{5}$ $\frac{2}{15}$ |
$\frac{3}{5}$ |
P(task is completed atleast once) = 1 - P(no one completes the task) $=1-\frac{2}{5}=\frac{3}{5}$ Option: 3 |