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Total number of balls = 8 + 5 + 7 = 20. The total number of ways to choose 2 balls from 20 is: C(20, 2) = (20 × 19) / 2 = 190. Now, the number of ways to choose 2 balls of different colors: Red and Green: 8 × 5 = 40 Red and Blue: 8 × 7 = 56 Green and Blue: 5 × 7 = 35 So, the total number of ways to choose 2 balls of different colors = 40 + 56 + 35 = 131. Therefore, the probability is: P(different colors) = 131 / 190 Correct Option: a)
If O is circumcentre of acute angled triangle ABC, if ∠ OBC = 300 then ∠BAC = ?
ABCD is a square. P, Q, R and S are points on the sides AB, BC, CD and DA respectively such that AP = BQ = CR = DS. Angle SPQ equal to ?
If I is the incentre of ΔABC , if ∠ BAC = 750 , then what is the measure of ∠ BIC?
What is the volume of a cylinder if the radius of the cylinder is 10cm, and the height is 20 cm? (Take π = 3.14
In ∆ABC, AD = DB , DE is parallel to BC, and the area of ∆ABC is 24 cm2. What is the area of ∆ADE in cm2 ?
In a right-angled triangle, the hypotenuse is 25 cm, and one of the sides is 20 cm. Find the radius of the circle inscribed in the triangle.
If the angles of the triangle are in the ratio of 1:2:3, then what is the smallest angle?
In the figure given below, PQ is parallel to RS. What is
