Question

Give me Both With solution​

Answer 1

9. The value of √3-2√2 is

solution: √3-2√2

trying to break the trem into (a-b)² = a² - b² + 2ab

➺√(√2 - 1)²

• Root will get canceled

➺ (√2 - 1)

• Opening bracket

➺√2 - 1 Answer

Option d.√2 - 1

______________

10.In a grouped frequency distribution, the class intervals are 0-10,10-20,20-30,...,then the class width is

Solution: As we given class intervals are 0-10,10-20,20-30,.. and to calculate class width we have to difference of upper limit subtract Lower limits

upper limit - Lower limit = answer

➺ 0 - 10 = 10

➺ 10 - 20 = 10

➺ 20 - 30 = 10

$➺ \dots - \dots = 10$

Therefore the class width is 10

Option b. 10