Writing in math use counters.tell how to make 10 when adding 8 5
2 answers:
Answer: Counters are an excellent method that children can use in their attempts to master math skills including counting, adding, subtracting, making patterns and comparing numbers.
The given sum = 8+5
To make 10 for adding them, first check which number is nearest to the 10.
We can see the number is 8 which is nearest to 10 in the given sum.
Now, to make a 10 here, we need to add 2 to 8 , and we subtract 2 from 5 such that the sum would become
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Answer:
a) P(x≥6)=0.633
b) P(4≤x≤8)=0.8989 (one standard deviation from the mean).
c) P(x≤7)=0.8328
Step-by-step explanation:
a) We can model this a binomial experiment. The probability of success p is the proportion of customers that prefer the oversize version (p=0.60).
The number of trials is n=10, as they select 10 randomly customers.
We have to calculate the probability that at least 6 out of 10 prefer the oversize version.
This can be calculated using the binomial expression:
b) We first have to calculate the standard deviation from the mean of the binomial distribution. This is expressed as:
The mean of this distribution is:
As this is a discrete distribution, we have to use integer values for the random variable. We will approximate both values for the bound of the interval.
The probability of having between 4 and 8 customers choosing the oversize version is:
c. The probability that all of the next ten customers who want this racket can get the version they want from current stock means that at most 7 customers pick the oversize version.
Then, we have to calculate P(x≤7). We will, for simplicity, calculate this probability substracting P(x>7) from 1.