Two fair tetrahedral dice with faces numbered 1,2,3 and 4 are thrown. The discrete random variable D is defined as the product of the two numbers thrown.
a: Find the probability distribution table of D.

b: Find P(D is a square number I D < 8).

c: In a CAS fundraising game, a prize of
US$12 is won if D is odd, and a prize of
US$6 is won if D is even. Find the price
of a ticket to ensure this is a fair game

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

do it yourself this is easy

step-by-step explanation: