answer:
bubble gum costs $0.15 and fudge costs $1.05
Step-by-step explanation:
you want to set up a systems of equation.
call cost of fudge "f' and call cost of bubble gum "b". Chase's purchase proves 5.70=5f+3b. Sara's purchase tells us that 3.60=2f+10b. you can solve with substitution or elimination
50% chance of a positive number. there are 30 numbers and 15 if them are positive. 15 is half of 30
Answer with Step-by-step explanation:
Since the given event is binary we can use Bernoulli's probability to sove the problem
Thus for an event 'E' with probability of success 'p' the probability that the event occurs 'r' times in 'n' trails is given by

Part a)
For part a n = 11 , r =9, p = 0.75
Applying values we get

Part b)
For part b n = 20 , r = 16 , p=0.75
Applying values we get
