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There are ways of getting exactly 5 heads in 10 tosses. There are
possible outcomes. So the probability of getting exactly 5 heads is
Answer:
The Surface area of the moon is
Step-by-step explanation:
Given:
Diameter of the moon = 3.8 x 10 to the 8th
To Find :
The surface area of the moon = ?
Solution:
The moon is in the shape of of the sphere .
So the surface area of the moon = surface area of the sphere
The surface area of the sphere =
Where r is the radius of the sphere
Radius , r =
r =
r =
Now the surface area of the moon with radius r = is
=>
=>
=>
=>
=>
Solution :
First term, a₀ = -10 .
Common difference of A.P. , d = -8 - (-10) = 2 .
Last term, aₙ = 24 .
We know, last term is given by :
aₙ = a₀ + (n-1)d
24 = -10 + (n-1)×2
2n - 2 = 34
n = 18
Now, sum of series is given by :
Hence, this is the required solution.