Question

Plz ansr these two qstns..

I will mark u brainly!!❤❤

Answer 1

Answer:

10. (D)

11. (B)

Step-by-step explanation:

(10)

Let the radius of two spheres be r and R.

⇒ [(4/3)πR³]/(4/3πr³] = 64/27

⇒ (R³/r³) = 64/27

⇒ (R/r)³ = (4/3)³

⇒ R/r = 4/3

Now,

Surface area of the sphere with radius R = 4πR².

Surface area of the sphere with radius r = 4πr².

Ratio of surface area:

= 4πR²/4πr²

= R²/r²

= 4²/3²

= 16/9

= 16 : 9.

(11)

Given data is 15,8,10,6,12,11,4,7,3.

Arrange the data in ascending order.

3,4,6,7,8,10,11,12,15

Number of observations = 9.

Median = (n + 1/2)th observation

            = (9 + 1/2)th

            = 5th observation.

            = 8.

Therefore, Median is 8.

Hope it helps!