Question
In a class of 30 students, 18 students like mathematics,
15 like science, and 8 like both subjects. What is the probability that a randomly selected student likes at least one of the two subjects?Solution
Let the total number of students be 30. Students who like mathematics = 18 Students who like science = 15 Students who like both mathematics and science = 8 Using the formula for the union of two sets: P(Math or Science) = P(Math) + P(Science) - P(Math and Science) P(Math or Science) = 18 + 15 - 8 = 25 The probability is: P = 25 / 30 = 5 / 6 Correct Option: b
The following expressions form a series followed by a (?). Find the odd one out first and then find that what will come in place of the question mark (?...
104 106 110 113 ? 126
A’ is the nth term of the given series and ‘B’ is the (n + 1)th term of the given
series. Choose the correct statement from the following s...
157, 159, 189, 319, ‘?’, 1 407 , 2749
Complete the series choosing the missing number.
8, 13, 20, ____, 40.
24 47 137 ? 2679 16049
...315 146 267 ? 235 210
8 24 12 ? 18 54
Look at the below pattern and complete the series: 11, 15, 22, 26, 33, 37, 44, ?
8 20 36 56 80 ?
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