Answer: 3/40
Step-by-step explanation:
Number of A's = 4
Number of B's = 5
Number of C's = 6
Number of D's = 5
Total number of letters tiles = 20
Probability of selecting C = 6/20 = 3/10
Probability of selecting D = 5/20 = 1/4
P( C and D)= 3/10 × 1/4 = 3/40
<span>E = {x|x is a perfect square between 1 and 9} = {1,4
</span><span>F = {x|x is an even number greater than or equal to 2 and less than 9}
</span><span>D = {x|x is a whole number}
</span>
answer
D ∩ (E ∩ F) = 4
Answer:
=−7
Step-by-step explanation:
Answer: there are 580 seats
Step-by-step explanation:
The number of seats in each row is increasing in arithmetic progression.
The formula for determining the sum of n terms of an arithmetic sequence is expressed as
Sn = n/2[(2a + (n - 1)d]
Where
a represents the first term of the sequence.
d represents the common difference.
n represents the number of terms in the sequence.
From the information given,
a = 10 seats
d = 2 seats (the seats in each row are increasing by 2)
n = 20(number of rows)
We want to determine the number of seats in 20 rows. Therefore
S20 = 20/2[(2×10 + (20 - 1)2]
S20 = 10(20 + 38) = 10×58
S = 580
Answer:
(B) The second one, b√a
Step-by-step Explanation:
