The average score in Mathematics of 90 students of section A and B of class IX was 63. The number of students in A were 10 more than those in B. The average score of students in A was 30% more than that of students in B. The average score of students in B is:
Let the students in section B be ‘x’ Students in section A = x + 10 ⇒ (Sum of the score of students)/number of the students = 63 ⇒ Sum of the score of students = 90 × 63 ⇒ Sum of the score of students = 5670 Number of the students = 90 ⇒ x + x + 10 = 90 ⇒ x = 40 Students in Section B = 40 Students in section A = 40 + 10 = 50 Let the average be ‘p’. Average of students in section A = 130% of students in section B ⇒ (Average of students in section A/Average of students in section B) = 13p/10p ⇒ 13p × 50 + 10p × 40 = 5670 ⇒ 650p + 400p = 5670 ⇒ 1050p = 5670 ⇒ p = 5.4 Average of students in section B = 10p ⇒ 5.4 × 10 ⇒ 54
Potato (Solanum tuberosum) is the most important food crop of the world. Potato is a temperate crop grown under subtropical conditions in India. When is...
Reduction in dry matter, decrease in amino acid content and accumulation of nitrates is the deficiency symptoms of:
Who write the book 'I Too Had a Dream'?
What is the specific meaning of "Capon" within the Poultry Industry?
Small pelagic fish which are preyed on by larger predators for food is known as
Panama wilt disease marked with wilting and a light yellow colouring of the lower leaves, most prominent around the margins, is a disease of ____
Which tillage implement requires minimum draft per unit width?
What is the most common temperature range for pasteurizing dairy products such as milk?
In india hybrid rice seed production is done through
Which of the following is citric acid soluble Phosphoric acid?