For the following questions answer them individually
The mean height of 30 students was given as 140 cm. It was later observed that one of the observations was incorrectly copied as 121 cm while it was actually 134 cm. What was the correct mean height? [Give your answer correct to one place of decimal.]
Rahul sold a box for ₹1,440 at a loss of 40%. What should the selling price of the box be to enable Rahul to earn a profit of 40%?
The interest accrued on a sum of ₹12,000 in two years, when interest is compounded annually, is ₹3,870. What is the rate of interest per annum?
The perimeter of an equilateral triangle is 40 cm more than the length of each of its sides. What is the length of each side of this equilateral triangle?(in cm)
What is the value of $$\frac{1}{7} \times \frac{1}{8} \div \frac{1}{4} + \frac{1}{3} \times \frac{1}{9} + \frac{1}{6} \div \frac{1}{12}$$ of $$\frac{3}{7}$$?
In which of the following war did Alexander the Great defeat Paurav's Porus in 326 BC before?
Vikas has an income of ₹2.5 lakhs. Which of the following tax slabs of India is applicable for him?
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