Lea wants to save money on a new computer. the computer she wants cost $400 the discount for the computer is 30% if she gets it on sat. at 9pm she will revive an additional 10% off at sale price. if lea buys her computer on sat. before 9pm how much will she pay (without tax)
answer choices: a. 148 b. 160 c. 240 d. 252

D. $252

Step-by-step explanation:

Initial price of computer = $400

Less 30 % = -0.30 × 400 = - 120

                       Sale price =   280

Less 10 % = -0.10 × 280 =     -28

                     Final price =  $252

If Lea buys her computer on Saturday before 9 pm, she will pay $252.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0