If 100 students make up 40% of the 6th grade population, then 50 students make up 20% of the 6th grade population. 20% × 5 makes 100% so if your multiply 50 by 5 you'd get your population.
50 × 5 = 250 sixth-graders
Answer:

Step-by-step explanation:
Sample size 52 card
Pay for J or Q 
Pay for King or Ace 
Pay for others 
Therefore
Probability of drawing J or Q

Probability or drawing King or Ace

Probability or drawing Other cards

Therefore
Expected Gain is mathematically given as



7 + 5 = 12 so is an even number that the ticket the choose
Answer:
80
Step-by-step explanation:
the 80 is the tenth part so you do nothing its a trip up qustion
He buyed 240 cards because
20
x
12
-----
40
+
20
-------
240