Có 3 khối câu hỏi theo kiến thức: khối I gồm 5 câu dễ, 3 câu khó; khối II gồm 4 câu dễ, 2 câu khó; khối III gồm 5 câu dễ, 2 câu khó. Người ta chọn mỗi khối ra 2 câu hỏi để lập thành đề thi 6 câu. Tính xác suất đề thi có nhiều nhất 1 câu khó.

0.50 , 0.75

step-by-step explanation:

i would be 2,000 just get the square root of 50 which is 2500 and the divid 4/5 and last thing multiply the answer you get for that by the square root of 50

step-by-step explanation:

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.

median- 36f

mode - none

mean- 33.7 ~ 34f