My sister in grade 5 needs help but i dunt exactly know how to do the answers myself, so if someone can help me out i can explain to her better.
Thanks
3. You are using a tree diagram with 12 branches to show the possible outcome of a probability experiment What might the experiment have been?
4.a) Spin the spinner 2 times (spinner has the number 2,4,2,4 written on it) and add the numbers, use an experiment and a tree diagram to determine the probability that the sum will be grater than 10.
b? show your answers on a probability line include fractions with their labels.
3. you need 12 different outcomes: what about selecting a student at random and finding the probability of him being in grade 1-12?
4. How can you get more than 10 on a spin of two times? the highest number is 4.
4> OOps you have to spin it 3 times not 2 times
3. To determine what the probability experiment might have been with a tree diagram and 12 branches, you need to consider different scenarios where there are 12 possible outcomes. A common example could be flipping a fair coin 6 times. Each flip has 2 possible outcomes (heads or tails), so when you multiply the number of possibilities at each stage (2 x 2 x 2 x 2 x 2 x 2 = 64), you get a total of 64 possible outcomes. Therefore, this could be the experiment you can explain to your sister as an example.
4.
a) To determine the probability of the sum being greater than 10 when spinning the spinner 2 times, you need to create a tree diagram showing all possible outcomes. Since each spin has 4 possible outcomes (2, 4, 2, or 4), you can create a tree diagram with 4 branches for each spin.
Start by drawing the first level of the tree diagram with the four possible outcomes for the first spin: 2, 4, 2, or 4. Then, for each of these outcomes, extend four branches representing the four possible outcomes for the second spin. For example, if the first spin is 2, the four branches for the second spin would be 2+2=4, 2+4=6, 2+2=4, and 2+4=6.
Next, calculate the sum of each outcome in the tree diagram. For instance, if the first spin is 2 and the second spin is 2, the sum would be 2+2=4. Repeat this for all possible outcomes in the tree diagram.
Finally, count the number of outcomes where the sum is greater than 10 and divide it by the total number of possible outcomes. This fraction will represent the probability that the sum will be greater than 10.
b) To show the answers on a probability line, start by drawing a horizontal line with a labeled scale from 0 to 1, representing the probability range. Mark the relevant fractions on the line corresponding to the probability calculated in part a (e.g., if the probability is 1/16, mark the point 1/16 on the line). You can use equal intervals on the line to place the fractions accurately.
By explaining these steps to your sister, she should have a better understanding of the process and be able to calculate the probability and represent it on a probability line.