Ask question

Ask question

All categories

wolverine [178]

3 years ago

8

You cannot remember your 4-digit bike-lock combination. What is the probability that you guess the combination correctly? (Enter

your probability as a fraction.)
=_________

1 answer:

Svetradugi [14.3K]3 years ago

3 0

1/10000 every try

..................

You might be interested in

Which is the graph of y = cos(x) + 3?

Elena-2011 [213]

Hi, I hope this helps !

5 0

2 years ago

Read 2 more answers

The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).

lesantik [10]

Answer:

(a).

$S_{n} = \frac{n}{2} (4n + 20) \\ \\S _{n - 1} = \frac{(n - 1)}{2} (4n - 4 + 20) \\ \\ S _{n - 1} = \frac{(n - 1)}{2} (4n + 16) \\ \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2} \\ \\ { \boxed{S _{n - 1} = {2 {n}^{2} + 6n - 8}}} \\$

(b).

from general equation:

$S _{n - 1} = \frac{(n - 1)}{2} (4n + 16)$

first term is 4n

common difference:

$16 = \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d = \frac{16}{n - 2}$

8 0

3 years ago

Write "six times 3 minus 3" as an expression.

777dan777 [17]

Answer:

6(3)-3

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Ben’s driving test had 40 questions and he correctly answered 12 more than he missed. How many questions did he miss?

k0ka [10]

Answer:

He missed 14 questions

Step-by-step explanation:

Total = Right + Miss ⇒ t = r + m

Right = Miss + 12 ⇒ r = m + 12

t = 40

Since t = r + m and r = m + 12 then:

t = m + 12 + m

t = 2m + 12

40 = 2m + 12

28 = 2m

m = 14

3 0

3 years ago

Evaluate 11c3 and 11p4

In-s [12.5K]

$_{n}C_{r} = \frac{n!}{r!(n-r)!} \\ \\ _{11}C_{3}= \frac{11!}{3!*(11-3)!} =\frac{11*10*9*8*7*6*5*4*3*2*1}{3*2*1*8*7*6*5*4*3*2*1} =\frac{11*10*9}{3*2} =165 \\ \\_{11}C_{4}=\frac{11!}{4!(11-4)!} =\frac{11*10*9*8*7!}{4!*7!} =\frac{11*10*9*8}{4*3*2*1} =330$

7 0

3 years ago

Read 2 more answers