Question
In a school, there are 30 male students and 20 female
students. The average marks of male students is 58 and that of female students is 62. Calculate the overall average marks of the students.Solution
ATQ,
Required average = (30 × 58 + 20 × 62) ÷ (30 + 20)
= (1,740 + 1,240) ÷ 50
= (2,980 ÷ 50) = 59.6
Which base is present in soap?
Which of the following is the most electronegative element in the periodic table?
Which of the following isotope of hydrogen is radioactive in nature?
Which of the following organic compounds undergo nucleophilic substitution reaction most easily?
Which polymer is formed by the copolymerization of phenol and formaldehyde?
A radioactive substance emits?
Sound cannot pass through –
Which of the following vitamins is called a water-soluble vitamin?
Which element is commonly used in nuclear reactors for producing electricity by nuclear fission?
Which reaction represents the correct method of extracting iron from its ore in a blast furnace?