Math Questions

Question

Need help

 

Candy A costs $11 per kilogram. Candy B costs $5 per kilogram. John bought a 2:1 mixture

of candy A and B. Mary bought a 1:2 mixture of candy A and B. How much more money did

John spend than Mary per kilogram?

 

 

Mike had an average of 58 for a certain number of exams in his English class. If he gets a

68 on his next exam, his average score will raise to 60. How many exams has Mike already

taken?

Answer 1

A $11 for 1 kilogram

B $8 for for 1 kilogram

2:1 mixture costs (2(11)+8)/3 = $10 per kilo

1::2 mixture costs (11+2(8))/3 = 27/3 $9 per kilo

1st mixture costs $1 per kilo more