1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tankabanditka [31]
3 years ago
8

Lenny rolls two number cubes. What is the probability that the sum of the numbers Lenny rolls is either 4 or 7?

Mathematics
2 answers:
Mashutka [201]3 years ago
7 0

Probability of an event =


(number of ways the event can happen) / (total number of possible outcomes) .


Well, the total number of possible outcomes is easy. It's


(6 possibilities for the first cube) x (6 possibilities for the 2nd cube)


= 36 total possible ways for two cubes to roll.


Now, how many of those possibilities show either 4 or 7 ?


Well, here's how a 4 can come up:


1 . . . 3

2 . . . 2

3 . . . 1


and here's how a 7 can come up:


1 . . . 6

2 . . . 5

3 . . . 4

4 . . . 3

5 . . . 2

6 . . . 1 .


So there are 9 ways all together for Lenny to be successful.


The probability is (9/36) .


That's 1/4 , or 25% .

WITCHER [35]3 years ago
6 0

|\Omega|=6^2=36\\ |A|=\underbrace{3}_{\text{the sum is 4}}+\underbrace{6}_{\text{the sum is 7}}=9\\\\ P(A)=\dfrac{9}{36}=\dfrac{1}{4}=25\%

You might be interested in
18 divided by 6 multiples by 4-3 +6
yKpoI14uk [10]
15 is the answer i think
6 0
3 years ago
The function f(x) is an increasing function about which little else is known about other than f(2)=7 and f'(2)=5. Find (f^-1)'(7
andreyandreev [35.5K]

Since f(x) is (strictly) increasing, we know that it is one-to-one and has an inverse f^(-1)(x). Then we can apply the inverse function theorem. Suppose f(a) = b and a = f^(-1)(b). By definition of inverse function, we have

f^(-1)(f(x)) = x

Differentiating with the chain rule gives

(f^(-1))'(f(x)) f'(x) = 1

so that

(f^(-1))'(f(x)) = 1/f'(x)

Let x = a; then

(f^(-1))'(f(a)) = 1/f'(a)

(f^(-1))'(b) = 1/f'(a)

In particular, we take a = 2 and b = 7; then

(f^(-1))'(7) = 1/f'(2) = 1/5

3 0
2 years ago
Eight workers are hired to harvest strawberries from a field.Each is given a plot which is 9*6 feet in size. What is the total a
GrogVix [38]
Since the equations for area is A= L*W 

A= 9*4= 54
3 0
3 years ago
Solve for f. d(e-f)=g
Yakvenalex [24]

Isolate the variable by dividing each side by factors that don't contain the variable.

f=e-g/d

8 0
3 years ago
Over the period of a year, Sam’s net worth increased. Which of the following could be true?
MAXImum [283]

Answer:

Sam's assets increased by more than his liabilities.

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • Can somebody please help me with these
    7·1 answer
  • CAN SOMEONE PLEASE HELP ME The expression (y – 9)2 is equivalent to which expression. Simplify and write in standard form. Show
    7·1 answer
  • How many 9 digit combinations with 10 numbers?
    6·1 answer
  • HELP ASAP! The number of entertainment websites in 1995 wass 54. By 2004 there were 793 entertainment website..
    8·1 answer
  • Which of the following statements demonstrates the associative property of multiplication?
    14·1 answer
  • Please really need anyone’s help on this thank you
    11·2 answers
  • 16. Which is greater, 4-2 or<br> 2-4? How do you know?
    13·2 answers
  • Need help! due today
    6·1 answer
  • From the set {24, 36, 72}, use substitution to determine which value of x makes the inequality true. A. 72 B. 36 C. none of thes
    12·1 answer
  • PLEASE HELP ME OVER HERE
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!