statistics
posted by chisom .
there are 80 students in a math class.20% of the students in the class scored above 50 marks in the test. what is the average of those students who scored below 50 marks

What are "50 marks"?
The average (mean) of the remaining 80% of students cannot be determined without more information.
Respond to this Question
Similar Questions

math
In his NPR radio program "A Prairie Home Companion," Garrison Keillor describes the mythical town of Lake Wobegon as a place where "all the women are strong, all the men are goodlooking, and all the children are above average." The … 
statistics
the average marks for statistics in a class of 30 were 52. the top six students had an average of 31 marks. what were the average marks of the other students? 
programming in c++
a program in c++ that accepts exam marks for 10 students and stores them in an array.the program should then calculate and utput the average marks for the class.and give an account of marks below average and output all marks above … 
math
in a mathematics class half of the students scored 91 on an achievement test. with the exception of a few students who scored 47, the remaining students scored 7. which of the following statements is true about the distribution of … 
math
Angela scored in the 90th percentile of her class math test. If 27 students scored the same as or lower than she did, how many students are in the class? 
math
Eighty students took the prealgebra test and 90% of them scored 85% or higher. How many students scored 85% or higher on their test? 
Algebra
The 22 students present for a recent test in Ms. Huangâ€™s class had an average score of 88. When students who were absent took the test, three scored 4 points higher than the average and two scored one point higher than the average. … 
fractions
In Mr. Johanessen's class, 1/4 of the students failed the final exam. Of the remaining class, 1/3 scored an A. What fraction of the whole class passed the test but scored below an A? 
Average
In a class 20% students failed 60% students scored average marks and the remaining above average marks find number of students in the class ? 
Maths
There are fifty students in a class. In a 100 marks exam, 20 students scored less than 30 marks, 5 students scored more than 70 marks and the remaining scored between 30 and 70 marks. If passing score is 55 marks and 40% students have …