a). How many different ways can student guess the answers to two True or Flase q

Question

a). How many different ways can student guess the answers to two True or Flase question?

b).There are 5boys and 6girls in a class,how many different boy-girl date are possible?

c).How many ways can the letters in the word SUCCESS be arranged?

d).How many two-digit numbers can be formed with the numerals 2,5,4,7,6?

e).How many of the numbers in (d)are odd?

f).How many differen committees can be formed with Ray,susan,Mark and Peter if only 3 people can be on a committee?

g).What is the smallest number of people that must be in a room to be absolutely sure that at least two people were born on the same day in january?

h).How many ways can 5 friends form a line at a ticket counter to buy tickets to see a movie?

i).A multiple choice test has five choices,(a),(b),(c),(d) and (e). what is the probability of guessing on a question and getting it correct?

j).There are 8boys and 3girls in a family.How many ways can the gender of 11 children be arranged?

Explanation / Answer

a) 4 (TT,FF,TF,FT)

b) 5C1*6C1=30

c)7P7/(3!*2!)
=420

d)5P1*4P1=20  (no repitions)

e) 4P1*2P1=8

f)4P3=24

g)real answer: infinity
answer they expect is based on probability that 2 people are born on the same day..
P(same day)=(1/31)*(1/31)
therefore there should be 312=961 people.

h)5P5=120

i)1/5=0.2

j)11P11/(8!*3!)=165

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.