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3 years ago

5/6 plus 1 and 3/4 I need an answer to this

2 answers:

6 0

Answer:
= 2 7/12
=
2
7
12
Solution by separating parts
Rewriting our equation with parts separated
56+1+34
5
6
+
1
+
3
4
Solving the fraction parts
56+34=?
5
6
+
3
4
=
?
Find the LCD of 5/6 and 3/4 and rewrite to solve with the equivalent fractions.
LCD = 12
1012+912=1912
10
12
+
9
12
=
19
12
Simplifying the fraction part, 19/12,
1912=1712
19
12
=
1
7
12
Combining the whole and fraction parts
1+1+712=2712
1
+
1
+
7
12
=
2
7
12
mark me brainliest if this helps!!

Alexus [3.1K]3 years ago

3 0

Answer: 31/12

Step-by-step explanation:

7/4 + 5/6

42/24+ 20/24 = 62/24 = 31/12

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3 years ago

In 2019, approximately 97.4% of all the runners who started the Boston Marathon (in Boston, Massachusetts, USA) were able to com

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Answer:

The probability that exactly 97 of them finished the marathon is 0.221.

Step-by-step explanation:

We are given that in 2019, approximately 97.4% of all the runners who started the Boston Marathon were able to complete the 42.2 km race.

100 runners are chosen at random.

The above situation can be represented through the binomial distribution;

$P(X = x) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r};x = 0,1,2,3,......$

where, n = number of trials(or samples) taken = 100 runners

r = number of success = exactly 97

p = probability of success which in our question is the probability

that runners finished the marathon, i.e; p = 0.974

So, X ~ Binom(n = 100, p = 0.974)

Now, the probability that exactly 97 of them finished the marathon is given by = P(X = 97)

P(X = 97) = $\binom{100}{97} \times 0.974^{97} \times (1-0.974)^{100-97}$

= $161700 \times 0.974^{97} \times 0.026^{3}$

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Hence, the required probability is 0.221.

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