Could someone help me? I can't understand anything
1 answer:
Answer:
I will only help with number one so you can learn how to do it. If you still dont understand, let me know and ill be here to help.
Step-by-step explanation:
> 21
what you have to do is get the x to be on its own. So we need to get rid of the 4. Since it's a fraction and fractions are division, you need to multiply both sides by 4. The reason as to why you multiply is because multiplication is the opposite if division. By multiplying both sides you get rid of the four and you are left with:
x>84
Again, let me know if you still need help.
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The probabability that he will obtain a black marble is as follows.
Using the first event, since there are 7 striped marbles and there's a total of 10 marbles, the probability must be as follows:
For the next three event, since there are no replacements, the denominators of each factor will be subtracted by 1. Thus, we have the following:
Since one striped marble is already taken in the first event, there must be 6 striped marbles left in the second event, and 5 on the third event. As for the fourth event, there are 3 black marbles based from the given. Thus, the probability up until the fourth event is as follows:
Finally, to find the probability that he will select a black marble on the fifth event, the fifth factor must have a denominator of 6 since 4 marbles were already taken out in the first 4 events. On the other hand, the numerator must be 2 since one black marble is taken out on the 4th event.
Thus, simplifying the probability, we have the following:
Therefore, the probability must be 1/24.