Banz4687 Banz4687

17-02-2018
Mathematics

contestada

25 students average 84 on a test. another group of 20 students averages 66. find the overall average.

Respuesta :

17-02-2018

84*25=sum of all 25 students marks
66*20=sum of 20 students marks
total average=(84*25+66*20) / 25+20
=(2100+1320)/45
= 3420/45
=76

Answer Link

Otras preguntas

When a part of a chromosome is cut and then reinserted backwards, a __________________ mutation results?

help with geometry!!!!!!!

The city of Southville is building a new city park. The total cost of the park is p . To pay for the park, the city has contributed x dollars toward the proj

Are they contracts in the black market?

Which best describes what happens to sunlight after it passes through the keyhole of a door?

How many different non-congruent isosceles triangles can be formed by connecting three of the dots in a 4 x 4 square array of dots?

If you use soy milk on a regular basis you should

Help me with Spanish please Following the pattern, write out the missing numbers in Spanish. Modelo : 5, 10, 15 ... 50 = veinte, venticinco, treinta, treinta

1.3 Q8 The length of a new rectangular playing field is 6 yards longer than double the width. If the perimeter of the rectangular playing field if 282 yards, wh

Which answer below, would be a possible new strand if there was a insertion mutation in the sequence below? T T C G A A T C G T A T G A Canswers1. T T C G A A