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Let number of 10 paisa, 20 paisa and 50 paisa coins be ‘9x’, ‘7x’ and ‘5x’, respectively. ATQ, (0.1 × 9x) + (0.2 × 7x) + (0.5 × 5x) = 48 Or, 0.9x + 1.4x + 2.5x = 48 Or, 4.8x = 48 So, x = 10 So, number of 20 paisa coins = 7x = 70 Therefore, required number of coins = 0.40 × 70 = 28
A can complete a work in 30 days, B in 24 days, and C in 20 days. A, B, and C work together for 5 days, after which B and C leave. How many more days wi...
A biased coin shows heads with probability 0.3. If it is tossed 5 times, what is the probability of getting no more than 2 heads?
A car typically travels 20% faster than a bike. The bike takes 4 hours to cover 300 km. If the car's speed were 8 km/h less than ...
Find the reciprocal of the complex number z = 9 – 4i.
From the top of a tower 60 meters high, the angle of depression of two points on the ground on opposite sides of the tower are 30° and 60°. Find the d...
In a school, Boys are 60% of total students. 50% Boys students failed. Total 55% of students in school fail. employees in the company are working for mo...
A and B initiated a business by investing Rs. 6,000 and Rs. 3,000, respectively. Their investments were made for 8 months and 'm'...
A rectangle has a length that is 4 cm more than its width. If the perimeter of the rectangle is 32 cm, find the dimensions of the rectangle.
{656.08 + 89.13 - 291.91 + 319.31 - 402.98} = ?
A and B together can complete a task in 12 days. B alone can complete it in 20 days. How long will it take A to complete the task if he works alone?
