Question
A bag contains 15 black balls, 25 white balls, and 20
yellow balls. If three balls are drawn at random with replacement, what is the probability of drawing a white ball first, a black ball second, and a yellow ball third?Solution
Since, the ball is replaced each time
Therefore, required probability = (25/60) Ć (15/60) Ć (20/60) = 5/144
The median of the following distribution is:
The ratio of the ages of A and B is 3:4. Five years later, the ratio of their ages will be 4:5. What are their present ages?
How many perfect square factors does 512 have?
- What type of virus attaches itself to the execution of other software programs?
Let f: [3, ā) ā R be defined by f(x) = xĀ² ā 6x + 11. The range of f is:
Solve the equation: 2xĀ² - 8x + 6 = 0.
A and B enter into partnership. A invests some money at beginning, B invests thrice the amount after 4 months and C invests double the amount after 8 mo...
If tanā»Ā¹(x) + tanā»Ā¹(y) + tanā»Ā¹(z) = Ļ/2, then the value of cotā»Ā¹(x) + cotā»Ā¹(y) + cotā»Ā¹(z) = ?
13, 91, 108, 756, ?,Ā 5411
A businessman bought goods for Rs 1050 and sold them on the same day for Rs 1228.5 on credit for 10 months, thus earning a profit of 4%. Find the rate o...
