In a class there are 20 boys and the remaining students are girls.The mean weights of the total 50 students is 23 kg. The mean weight of boys is 30.Then find out the mean weight of girls.

In a class there are 30 students and 33 (1)/(3) % of them are girls. How many girls are in the class?

In a class of 100 students, there are 70 boys whose average marks in a subject are 75.If the average marks of the complete class is 72. then what is the average of the girls?

In a class there are 17 boys and 13 girls . In another class there are 15 boys and 12 girls. What is the probability of selecting a girl from all students from both the classes.

The mean of the frequency table given below is 50.Then find out the values of a and b. .

60 % of the students in a class are boys. If the number of girls in the class is 20 , what is the total number of students?.

In class10A,there are 30 boys and 20 girls. In10B, there are 15boys and 25 girls. One student is to be selected from each class.What is the probability ofone boy and one girl?

Mean mark scored by the students of a class is 53. The mean mark of the girls is 55 and the mean mark of the boys is 50. What is the percentage of girls in the class ? a) 60% b) 40% c) 50% d) 45%