Answer:
Step-by-step explanation:
The data of timing for each lap will form a arthmetic progression ( AP ) with first term as 25 s and common difference of 1.6 s .
a )
first term a = 25
common difference d = 1.6 .
10 th term of the series can be given by following formula
a₁₀ = 25 + ( 10-1 ) x 1.6
= 25 + 1.6 x 9
= 39.4 s
b )
Let n th be the last lap
a(n) = a + ( n-1 ) x d
55.4 = 25 + ( n- 1 ) x 1.6
n - 1 = 19
n = 20 .
c )
sum of all the term of AP
=( first term + last term ) x no of term / 2
= (25 + 55.4 ) x 20 / 2
= 804 s .
= 804 / 60 min
= 13.4 min .
Answer:
ill help
Step-by-step explanation:
Answer:
this is hi ow my teacher taught me put the whole numbers on one side and the fractions on the other the find a common denominator then add all together if it ends up a improper fraction convert to mixed number then add whole numbe and fraction and if the new mixed number has a number add bvb it t ok the whole number then combine to face your final anwser
Answer: P(none of them Europeans play against each other)=
Explanation:
Since there are 8 teams in which 3 are Europeans.
So, remaining 5 teams are not Europeans
We have to take 2 teams to pair up.
And we have a condition that neither of team is European.
So the favourable outcome =
and the total outcomes=
So, by using theprobability formula i.e.
P(E)=
P(getting none of European team play against each other)=
=
=