What is the probability of getting either blue or freen on a spinner that is 3/10 green and 1/5 blue?
I added 3 and 1 and got 4. So is my answer 4/10 ?
because 5 times two is ten and 1 times 2 is 2 but you do this because you need a comen denominater
In reality, you need to be considering these:
green - 3/10
blue - 2/10
Do you see why?
To determine the probability of getting either blue or green on the spinner, you should add the individual probabilities of getting each color.
The given information states that the spinner is 3/10 green and 1/5 blue. To find the sum of these probabilities, you need to find a common denominator. In this case, the least common denominator between 10 and 5 is 10.
To express the probability of getting green with a common denominator of 10, you need to multiply both the numerator and denominator by 2 (since 5 multiplied by 2 equals 10). This gives us 6/10.
Similarly, to express the probability of getting blue with a common denominator of 10, you need to multiply both the numerator and denominator by 2 (since 5 multiplied by 2 equals 10). This gives us 2/10.
Next, you can add the probabilities of getting green and blue: 6/10 + 2/10 = 8/10.
Finally, simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 2 in this case. This simplifies the fraction to 4/5.
Therefore, the probability of getting either blue or green on the spinner is 4/5, not 4/10.