This answer should be the third one
There are 625 different 4-digit codes only made with odd numbers.
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How many different combinations can you make?</h3>
To find the total number of combinations, we need to find the number of options for each one of the digits.
There are 4 digits, such that each digit can only be an odd number.
- For the first digit, there are 5 options {1, 3, 5, 7, 9}
- For the second digit, there are 5 options {1, 3, 5, 7, 9}
- For the third digit, there are 5 options {1, 3, 5, 7, 9}
- For the fourth digit, there are 5 options {1, 3, 5, 7, 9}
The total number of different combinations is given by the product between the numbers of options, so we have:
C = 5*5*5*5 = 625.
There are 625 different 4-digit codes only made with odd numbers.
If you want to learn more about combinations:
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Answer:
C. 350
Step-by-step explanation:
A sample of 50 different coloured balls are removed from total golf balls made.
Out of these 50 coloured balls, 8 balls are pink
Now, to calculate the total number of golf balls made,
we can use the concept of proportion
= 

total golf balls made = 
total golf balls made = 350