Question

Can I pls know the answers for these questions

Answer 1

Answer:

1. A. a × (b + c) = a × b + a × c

2. B. 3/5

3. A. 7

Step-by-step explanation:

1. If a,b and c are integers then, according to distributive law.

⇒ A. a × (b + c) = a × b + a × c

• The name itself suggests that something is being distributed by someone to someone, Here b and c are given with a. Hence, this is named as the distributive law.

Ex: 5 × (10 + 20) = 5 × 10 + 5 × 20

⇒ 5(30) = 50 + 100

∴ 150 = 150

2. A number is chosen at a random from 1 to 5. What is the probability that the number chosen is odd ?

⇒ We have, 1 - 5.

Total number of outcomes = 5

(Favourable)Number of odd numbers (1,3,5) = 3

Probability of odd number:

⇒ Favourable outcomes/Total number of outcomes

• 3/5

∴ B. 3/5 is the required probability.

3.The solution of the equation 3x + 4 = 25 is.

⇒ 3x + 4 = 25

⇒ 3x = 25 - 4

⇒ 3x = 21

⇒ x = 21/3

∴ A. x = 7 is the solution of the equation.

Verify:

• 3(7) + 4 = 25
• 21 + 4 = 25
• 25 = 25