Answer:
0.25
Step-by-step explanation:
Given that:
Number of options per question = 4
Number of correct answer per question = 1
Number of incorrect answers per question = 3
By random guess:
Probability of picking a correct answer :
Number of correct answers / number of options
= 1 / 4 = 0.25
Probability of picking an incorrect answer :
Number of incorrect answers / number of options
= 3/4
Hence,
X :______ 4 _____ - 1
P(X) : ___ 0.25 __ 0.75
Σ(X*P(x))
(4 * 0.25) + (-1 * 0.75)
1 + (-0.75)
1 - 0.75
= 0.25
Answer:
He would need to mow 7 lawns to buy the discount scooter and 9 without the discount
Step-by-step explanation:
If he mowed 7 lawns would make $47.25 and 47.25 - 1.05 for gas is 46.20
If he mowed 9 lawns for the non-discounted scooter he would make 60.75 and 60.75 - 1.35 for gas is 59.40
Answer:
Step-by-step explanation:
to show the work go to this webiste and type in the problem https://www.mathpapa.com/algebra-calculator.html
Answer:
a) 0.011
b) -0.0624
Step-by-step explanation:
See attached pictures.