Question

1. What is the fourth term in the expansion of (x + 4y)^6?

a) 7680x^3y^3
b) 3840x^2y^4
c)1440x^2y^4
d)1280x^3y^3

2. A bag contains 6 red marbles, 4 blue marbles, 7 green marbles, and 3 yellow marbles. A marble is drawn from the bag and is not replaced. Then a second marble is drawn. What is the probability that both marbles drawn were green?

Option A: 49/380
Option B: 49/400
Option C: 21/190
Option D: 21/200

3. A bag contains 3 red marbles, 4 blue marbles, and 6 green marbles. Which pair of events are complementary events?

a) choosing a red marble; choosing a blue marble
b)choosing a re

Answer 1

1) D

Answer 2

as t_4=6C3(x)^3(4y)^3=1280x^3y^3

Answer 3

2) 7/20*6/19=21/190
ans C

Answer 4

yes easy

Answer 5

hello chr34 have u understood??

Answer 6

Do you know the last one?

Answer 7

question is incomplete...

Answer 8

yes i also saw that some thing was missing there

Answer 9

Oops, #3 options:
a)choosing a red marble; choosing a blue marble
b) choosing a red marble; choosing a marble that is not red
c) choosing a blue marble; choosing a marble that is not green
d)choosing a green marble; choosing a red marble

Answer 10

Anyone?

Answer 11

b)

Answer 12

dip can you tell me how you got the first one?