Answer:
1, , .
Step-by-step explanation:
probability =
Total number of persons in the party = n
a) Pr ( every person gets their phone back) = Pr (each person picks his phone ) multiplied by number of person
= × n = 1.
No of first m persons to pick = m
No of last m persons to pick = 1 - m
b) Pr (first m persons to pick each gets their phones back) =
c) Pr( first m persons get a phone belonging to last m persons) =
Answer:
150
Step-by-step explanation:
Betty can type 100*6=600
Bob types 75*6=450
Betty-Bob (600-450)=150
Answer:
Yes
Step-by-step explanation:
Because it passes vertical line test.
Here you go I believe this is right
X= # of girls
Y= # of boys
X+Y=25
2X=3Y
Y=(-X+25) put into Y
2X=3Y
2X=3(-X+25)
2X= -3X+75
+3X
5X=75
X= 15
Plug X into one of the original equations
2(15)=3Y
30=3Y
Y=10
Ten boys and 15 girls (Solving Systems of Equations -Substitution)