There are three classes P, Q and R. The average marks of class P is 75. The average marks of class Q is 80. The averagemarksof class R is 85. The averagemarksof class P and Q is 77, the averagemarks of class Q and R is83. Find the approximate averagemarks of three classes.
By allegation method: 
So the ratio of students in class P to Q comes out to 3 : 2 & the ratio of students in class Q to Ris 2 : 3. Ratio of students in P, Q and R = 3 :2 : 3 So, average of all the classes = `(75xx3 + 80 xx2 + 85xx3)/(3+2+3)` =`(225+160+255)/8` = 80
In August 2020, Narendra Singh Tomar has launched the Integration of ICAR-IIHR Seed Portal with YONO Krishi Web Application of:
Recently RBI categorises 16 NBFCs as Upper Layer entities for bank-like compliances, which of the following is not in this list?
The state of matter in which the electrons are free in a cloud rather than attached to individual atoms is called ______.
Mahmud Begda was a famous sultan of which famous empire?
Where is the Sahara desert located in the following countries / continents?
Who is central vigilance commissioner in as of November 2023?
Match List-I with List-II and select the correct answer using the code given below the Lists.
Who was the last emperor of the Mauryan Dynasty?
Chief Election Commissioner of India appointed by ________.
Which of the following states is known as the Soyabean state of India?
