The number you are looking for is 995
0.018 will be 18/1000 = 9/500
22 students...16 boys
probability student will be a boy is 16/22 which reduces to 8/11 or 72.7%
1/2 of 14 is 7 so 7th x plus 8th x = 30+30 / 2 = the median is 30
2 less than (3 times a number) is the same as (the number plus 10)
2 less than (3*x) = (x + 10)
3x - 2 = x + 10
From here, you solve! :)
3x - 2 - x = x + 10 - x
2x - 2 = 10
2x - 2 + 2 = 10 + 2
2x = 12
2x / 2 = 12 / 2
x = 6
Hope this helps! :)
