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If Var(x) = 4, find Var (3x+8), where X is a random variable.
Var (ax+b) = a2 Var x
Var (3x+8) = 32 Var x = 36
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can you help me with math
The area enclosed between two concentric circles is 770cm 2 . If the radius of the outer circle is 21cm, find the radius of the inner circle. (Ans :14cm) Ans: Π R 2 - Π r 2 =
-3+4 #Minimum 100 words accepted#
If sin? = 1/2 , show that 3cos?-4cos 3 ? = 0. Ans: Sin ? = ½ ⇒ ? = 30 o Substituting in place of ? =30 o . We get 0.
show that all primes except 2, are of the form 4n-1 or 4n+1
You are going on a road trip and you buy snack packs and three different kind of beverages. You buy 7 Cokes, 5 Pepsis and 4 Dr. Peppers. You pull out two beverages at random. An
How can i calculate arc length for dividing a circle into 10 parts
10 puzzles
Find the third vertex of a triangle if its two vertices are (-1, 4) and (5, 2) and mid point of one side is (0, 3).
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