Adam and his dad share the cost of the meal in the ratio of 2:3.
1 answer:
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Answer:
- 45
Step-by-step explanation:
let n be the number , then
n - 11 = n + 4 ( add 11 to both sides )
n = n + 15 ( multiply through by 3 to clear the fraction
2n = 3n + 45 ( subtract 2n from both sides )
0 = n + 45 ( subtract 45 from both sides )
- 45 = n
The number is - 45
The amount of passwords possible is:
Since he only tries once for the first try we get:
Thus there is a:
Chance he will guess the password on his first try.
Since he only tries once for the first try we get:
Thus there is a:
Chance he will guess the password on his first try.