Question
Three years ago, Ritu was twice as old as Rajni, and
currently, the total of their ages is 36 years. What will Ritu's age be four years from now?Solution
Let Ritu's current age be x and Rajni's current age be y. Three years ago: x−3=2(y−3) (Ritu was twice Rajni's age) Currently: x+y=36 (Their total age is 36) Solve the equations: Ritu's current age, x = 23 Ritu's age 4 years from now = 23+4=27 years
((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?
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In a best-of-two chess match between Player X and Player Y, the probability that Player X wins a game is (5/9), and the probability that Player Y loses ...
If p = 33 - q - r and pq + r(q + p) = 260, then find the value of (p² + q² + r²).
