Number of non-defective bulbs = 600 – 12 = 588
Total number of bulbs = 600
Probability of picking a non-defective bulb $=\frac{\text{Number of non-defective bulbs}}{\text{Total number of bulbs}}$
Probability of picking a non-defective bulb = $\frac{588}{600}$ = 0.98

Given, it had rained 5 out of 7 days.
i.e., Number of rainy days = 5
Total number of days = 7
Then,
$\text{Probability}=\frac{\text{Number of rainy days}}{\text{Total number of days}}=\frac{5}{7}$

Let the number of students in a class be $x$.
The probability of students passing an exam = 0.6
Number of students who failed an exam = 20
Number of students who passed an exam $=x-20$
Probability of a student passing an exam $=\frac{\text{Number of students who passed an exams}}{\text{Number of students in a class}}$
$0.6=\frac{x-20}{x}$
$0.6x=x-20$
$0.4x=20$
$x=50$
The number of students in the class is 50.

Number of mangoes = 10
Total number of fruits = 10 + 10 + 10 = 30
Probability of picking a mango = $\frac{\text{Number of mangoes}}{\text{Total number of fruits}}$
Probability of picking a mango = $\frac{10}{30}=\frac{1}{3}$
Probability of not picking a mango = $1–\frac{1}{3}=\frac{2}{3}$.

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Suppose a die is rolled, the possible outcomes are 1, 2, 3, 4, 5, 6. Each number appearing on the face of a die does not affect the other numbers. Each number has a probability of $\frac{1}{6}$ to occur when a die is rolled. It does not depend on the number that it shows.
For instance, the probability that we roll a die and 2 comes is $\frac{1}{6}$, since there is only single 2 on the cube.

It is 82% likely that India will win the match means that there is 82% chance that India is winning the match. There is still 18% uncertainty that India will not win. In terms of probability, the probability of India winning will be 0.82. So India may or may not win. Therefore, we cannot say that India will definitely win.

As there are four different coins in Pavani's pocket, so there are 4 possible ways in which Goutham can steal a coin i.e. 1 rupee coin, 2 rupee coin, 5 rupee coin, 10 rupee coin. Therefore a total number of possible outcomes are 4.

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When you throw an unbiased die, the outcomes are 1, 2, 3, 4, 5 and 6 and none of them are multiple of 7.