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The lost pair of weight can be found by subtracting the a known pair from
the total weight leaving the value of the lost pair.
<u>The lost weight of a pair of boys is 120 kg</u>
Reasons:
Let <em>a</em>, <em>b</em>, <em>c</em>, and <em>d</em><em> </em>represent the weights of the four boys, we have;
The number of ways of selecting pairs (two boys) of boys from a group of
four is given using combination formula as follows;
Which gives;
₄C₂ = 6
Therefore, the weights of the pairs are;
a + b = 110
a + c = 112
a + d = 113
b + c = 118
b + d = 121
c + d = Lost weight
- c + d = Lost weight
a + b + c + d = 230 (given)
Therefore;
The lost weight, c + d = 230 - (a + b)
Which gives;
c + d = 230 - (110) = 120
The lost weight = c + d = 120
- <u>The lost weight = 120 kg</u>
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Answer:
The amount which she will have into account after 3 years is 17,400 unit
Step-by-step explanation:
Given as :
The principal which is deposited into an account = 12,000 unit
The rate of interest simple annual = 15%
The Time period = 3 years
Let The amount which she have after 3 years = A unit
<u>From simple Interest method</u>
Simple Interest =
Or , Simple Interest =
Or, Simple Interest =
∴ Simple Interest = 5,400 unit
Now,
Amount = Principal + Simple Interest
Or, A = 12,000 unit + 5,400 unit
∴ A = 17,400 unit
Hence The amount which she will have into account after 3 years is 17,400 unit . Answer
Answer:
or 0.0000128
Step-by-step explanation:
Add the exponents together
-4+-3=-7