Probability - Short Revision || CBSE Class 10 Mathematics || Infinity Learn Class 9&10

TL;DR

This content explains the concept of probability through multiple-choice questions and provides detailed answers for each question.

Transcript

so let's start with the mcqs in the chapter probability the question is if we throw two coins in the air then the probability of getting both Tails will be what so if you throw two coins what are the possible outcomes guys the possible outcomes are like this head head tail head and tail tail four possible outcomes are there and you want both Tails ... Read More

Key Insights

• #️⃣ Probability is calculated as the number of favorable outcomes divided by the total number of possible outcomes.
• ❓ The probability of an event can be represented as a fraction or a decimal.
• 🎴 The concept of probability can be applied to various scenarios, such as coin tossing and card drawing.
• #️⃣ Understanding the number of favorable outcomes and total possible outcomes is crucial in probability calculations.
• ❓ Probability can be used to determine the likelihood of specific outcomes in various situations.
• 🚱 Leap years have 52 Sundays, while non-leap years have 52 Sundays with a probability of one additional Sunday.
• 😑 Probability calculations involve ratios and fractions to express the likelihood of an event occurring.

Questions & Answers

Q: What is the probability of getting both tails when throwing two coins?

The probability is 1/4 because there is one favorable outcome (both tails) out of four possible outcomes (head-head, head-tail, tail-head, tail-tail).

Q: What is the probability of getting a sum of 5 when throwing two dice?

The probability is 1/9 because there are four favorable outcomes (1-4, 2-3, 3-2, 4-1) out of 36 possible outcomes (six possible outcomes for each dice).

Q: How many black cards are in a deck of 52 cards?

There are 26 black cards (spades and clubs), so the probability of drawing a black queen is 2/52, which simplifies to 1/26.

Q: What is the probability of a non-leap year containing 53 Sundays?

The probability is 1/7 because there are 52 fixed Sundays in a non-leap year, and the extra day can be any day of the week, including Sunday.

Q: How many bad eggs are there in a lot of 400, given a probability of 0.035?

The number of bad eggs is 14, calculated by cross-multiplying the probability and the total number of eggs.

Summary & Key Takeaways

• The probability of getting both tails when throwing two coins is 1/4.

• The probability of getting a sum of 5 when throwing two dice is 1/9.

• The probability of drawing a black queen from a deck of cards is 1/26.

• The probability of a non-leap year containing 53 Sundays is 1/7.

• The number of bad eggs in a lot of 400 is 14.