Question

You want to create an ID code for the students in your school based on three characters. The first and second characters must be a letter of the alphabet, and the third must be a digit between 1 and 9 inclusive. How many such codes are there? (Use

Answer 1

@ybarrap

Answer 2

Phone numbers consist of a three-digit area code followed by seven digits. If the area code must have a 0 or1 for the second digit, and neither the area code nor the seven-digit number can start with 0 or 1, how many different phone numbers are possible? How did you come up with your answer?

Answer 3

In a single experiment, a die is tossed and a spinner with the letters A, B, and C is spun. Each letter is equally likely.





Find the sample space and then find the probability of getting a B.

Answer 4

I need help with 1 2 and 3 ;
Please an& Thanks

Answer 5

and*

Answer 6

1st Question:
We have 26 letters in the alphabet and 9 numbers from 1-9
Our sample space will look like xyz, where x and y will come for this alphabet and z will come from 1-9
there are 26 possibilities for x
26 possibilities for y
and 9 possibilities for z
how many possibilities for x*y*z?

Answer 7

6084 ?

Answer 8

(yes, 6084)
2nd Question:
Phone numbers have abc-def-ghij
How many unique characters can each have
a
b
c

d
e
f

g
h
i
j
Then answer will be a*b*c*d*e*f*g*h*i*j

Answer 9

2nd Question: I get \( 10^{7}9^{2}2\). But please check validate by filling in a-j above.

Answer 10

what is the sample space

Answer 11

2nd Question: Should be \( 10^{7}8^{2}2\). Need to check!
Sample space will be abc-def-ghij such that
{ a,d \( \epsilon \) (2-8), b \( \epsilon \) (0,1) and c,e-j \( \epsilon \) (0-9) }. Need to check!

Answer 12

3rd Question Similar even easier