To find the probability that the selected day starts with the letter 'W' or 'S', we first need to identify the days of the week and check which of them meet the criteria.
There are a total of 7 days in a week:
- Monday
- Tuesday
- Wednesday
- Thursday
- Friday
- Saturday
- Sunday
Now, we list out the days starting with 'W' or 'S':
- Wednesday (Starts with 'W')
- Saturday (Starts with 'S')
- Sunday (Starts with 'S')
There are 3 days that start with 'W' or 'S'. Thus, the number of favorable outcomes is 3.
The total number of possible outcomes (days in a week) is 7.
The probability is given by the ratio of the number of favorable outcomes to the total number of possible outcomes:
\(\text{Probability} = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} = \frac{3}{7}\)
Therefore, the probability that the selected day starts with the letter 'W' or 'S' is \(\frac{3}{7}\).
This matches with the correct answer option, which is 3/7.
Important Questions from Probability
The probability of being 53 Sundays in year 2020 is-
Three dice are thrown randomly. The probability of coming 3 in at least one die is
The probability of having 53 Tuesdays in an ordinary year is:
Two dice are thrown simultaneously The probability of getting the sum 2 or 8 or 12 is
If two balanced dice are tossed once, the probability of the event, that the sum of the integers coming on the upper sides of the two dice is 9, is
