twistyjungle914 twistyjungle914
  • 24-09-2020
  • Mathematics
contestada

the mean marks for a french test in a class of 30 boys and 20 girls are 60 and 70 respectively. find the mean mark for the whole class​

Respuesta :

gabriellasuarez35
gabriellasuarez35 gabriellasuarez35
  • 24-09-2020

Answer:

30×60=1800

20×70=1400

1400+1800

3200÷(30+20)

3200÷50

64

the mean mark is 64

Answer Link

Otras preguntas

How might a political party leverage public debate in its favor?
a sum of money is divided in the ratio 3:5:9 .calculate the smallest sharegiven that the largest share is $108
Explain interpersonal skills
Approximately what percentage of land on earth is devoted to farming
A dramatic production, such as a play, is told almost entirely through dialogue, or _____. A.how the actors perform B. what the characters do C. what the char
does planet x have moons and rings
Mogu li se ovdje postavljati pitanja i na drugim jezicima?
A car decelerates such that each second it travels 5% less than the distance it traveled in the previous second. About how far does the car travel in 5 seconds
What are the differences between gateway's distribution model prior to 2004 and apple's distribution model?
Spermatogonia in the seminiferous tubules are located ________.