Q1) There are 6 blue beads, 4 are green beads, and 4 are red beads in a tray
a) What is the probability of picking a blue one?
b) What is the probability of picking a green one?
c) What is the probability of picking a red one?
[ a) P(blue)=\(\frac{3}{7}\).
b) P(green)=\(\frac{2}{7}\).
c) P(red)=\(\frac{2}{7}\).
]

Q1) There were 9 red beads ,and 6 blue beads in a packet . Two beads were picked and not replaced. What was the probability they were both red ?
[ \(\frac{12}{35}\) ]

Q1) There were 5 red pencils ,and some yellow pencils in a tin . Two pencils were picked at random and not replaced. The probability they were both red was \(\frac{5}{18}\). How many yellow pencils were there ?
[ 4 ]

Q2) There are 10 green sweets, 5 are purple sweets, and 4 are blue sweets in a tray
a) What is the probability of picking a green one?
b) What is the probability of picking a purple one?
c) What is the probability of picking a blue one?
[ a) P(green)=\(\frac{10}{19}\).
b) P(purple)=\(\frac{5}{19}\).
c) P(blue)=\(\frac{4}{19}\).
]

Q2) There were 4 purple pens ,and 4 blue pens in a box . Two pens were picked and not replaced. What was the probability they were both purple ?
[ \(\frac{3}{14}\) ]

Q2) There are 8 green beads ,and some blue beads in a packet . 8 extra blue beads were added. Two beads were picked at random and not replaced. The probability they were both green was \(\frac{14}{95}\). How many blue beads were there to begin with ?
[ 4 ]

Q3) There are 5 purple beads ,and 7 blue beads in a bag.
a) What is the probability of picking a purple bead?
b) What is the probability of picking a blue bead?
[ a) P(purple)=\(\frac{5}{12}\).
b) P(blue)=\(\frac{7}{12}\).
]

Q3) There were 10 blue pencils ,and 7 yellow pencils in a tin . Two pencils were picked and not replaced. What was the probability they were both blue ?
[ \(\frac{45}{136}\) ]

Q3) There are 7 purple apples ,and some red apples in a bag . 3 extra red apples were added. Two apples were picked at random and not replaced. The probability they were both purple was \(\frac{7}{57}\). How many red apples were there to begin with ?
[ 9 ]

Q4) There are 2 yellow beads, 8 are blue beads, and 5 are red beads in a tin
a) What is the probability of picking a yellow one?
b) What is the probability of picking a blue one?
c) What is the probability of picking a red one?
[ a) P(yellow)=\(\frac{2}{15}\).
b) P(blue)=\(\frac{8}{15}\).
c) P(red)=\(\frac{1}{3}\).
]

Q4) There were 10 yellow apples ,and 2 green apples in a bag . Two apples were picked and not replaced. What was the probability they were both yellow ?
[ \(\frac{15}{22}\) ]

Q4) There are 7 yellow pens ,and some blue pens in a tin . 6 extra blue pens were added. Two pens were picked at random and not replaced. The probability they were both yellow was \(\frac{1}{5}\). How many blue pens were there to begin with ?
[ 2 ]

Q5) There are 7 yellow pens, 3 are blue pens, and 6 are purple pens in a packet
a) What is the probability of picking a yellow one?
b) What is the probability of picking a blue one?
c) What is the probability of picking a purple one?
[ a) P(yellow)=\(\frac{7}{16}\).
b) P(blue)=\(\frac{3}{16}\).
c) P(purple)=\(\frac{3}{8}\).
]

Q5) There were 8 purple sweets ,and 5 yellow sweets in a packet . Two sweets were picked and not replaced. What was the probability they were both purple ?
[ \(\frac{14}{39}\) ]

Q5) There were 4 yellow sweets ,and some blue sweets in a box . Two sweets were picked at random and not replaced. The probability they were both yellow was \(\frac{2}{15}\). How many blue sweets were there ?
[ 6 ]