Question

Using MATLAB

A list of 30 test scores is: 31, 70, 92, 5, 47, 88, 73, 51, 76, 80, 90, 55, 23, 43, 98, 36, 87, 22, 61, 19, 69, 26, 82, 99, 71, 59, 49, 64

Write a computer program that determines how many grades are between 0 and 19, between 20 and 39, between 40 and 59, between 60 and 79, and between 80 and 100. The results are displayed in the following form:

Grades between 0 and 19, 2 students

Grades between 20 and 39, 4 students

Grades between 40 and 59, 6 students

and so on (Hint: use the command fprintf to display the results).

Answer 1

Ans

code:-

list=[31, 70, 92, 5, 47, 88, 73, 51, 76, 80, 90, 55, 23, 43, 98, 36, 87, 22, 61, 19, 69, 26, 82, 99, 71, 59, 49, 64];

c1=0;c2=0;c3=0;c4=0;c5=0;

%iterate and check conditions

for i=1:length(list)

if(list(i)<=19)

c1=c1+1;

elseif(list(i)>=20&list(i)<=39)

c2=c2+1;

elseif(list(i)>=40&list(i)<=59)

c3=c3+1;

elseif(list(i)>=60&list(i)<=79)

c4=c4+1;

elseif(list(i)>=80&list(i)<=100)

c5=c5+1;

end

end

%print result

fprintf('Grades between 0 and 19, %d students\n',c1);

fprintf('Grades between 20 and 39, %d students\n',c2);

fprintf('Grades between 40 and 59, %d students\n',c3);

fprintf('Grades between 60 and 79, %d students\n',c4);

fprintf('Grades between 80 and 100, %d students\n',c5);

If any doubts ask in the comments.