<span>times t hours and (t+2) hours)
d1 = 50 t
d2 = 40(t+2)
50 t = 10 + 40(t+2)
10 t = 90
t = 9
</span>
Hi there! It depends on how high the value is.
2 evens is an positive
1 odd,1 even is a odd
2 odd is an ofd
Answer:
86
Step-by-step explanation:
Given that there are 30 students in class 10R and the mean marks for the entire class was 70%. Therefore, total mark of class = 70 x 30 = 2100
Given that there are 20 boys in the class and the mean marks for the boys was 62 %. Therefore, total mark of boys = 62 x 20 = 1240
To calculate the mean mark for the girls we need to find the total number of girl and total mark of girls. total number of girl = 30 - 20 (boys) = 10 total mark of girls = total mark of class - total mark of boys = 2100 - 1240 = 860 mean mark for girls = 860 / 10 = 86
