Probability:
The chapter 'Probability' is typically carries a weightage of around 4 - 6 marks in the board exam. it covers the concepts like probability of an event.
Most possible variation of question types that we can expct in board exam as per previous year question paper are discussed below:
| Total marks 4 - 5 | |
| Variation 1 | Variation 2 |
Total Marks \(=5\)
|
Total Marks \(=4\)
|
- Probability - problems on finding the probability of an event
| Important concept(learning Outcomes) | Expected Question Type | Concept dealt with |
| Probability - complementary events, defective items | Sec A, Sec B | Find the probability of defective item |
| Probability - problems on cards, dice, coins | Sec C, Sec E | |
| Probability - problems on areas, numbers | Sec D, Sec B |
Let us recall the concepts in Probability:
1. The probability of an event \(P(E)\)\(= \frac{\text{Number of outcomes favourable to E}}{\text{Number of all possible outcomes of the experiment}}\)
2. The probability of sure event is \(1\)
3. The probability of impossible event is \(0\)
4. The probability of an event \(E\) is a number \(P(E)\) such that \(0 \leq P(E) \geq 1\)
5. For any event \(E\), \(P(E) + {P(\bar{E})} =1\), Where \(E\) and \(\bar{E}\) are called complementary events.