Answer:
4/7
Step-by-step explanation:
Since there are 7 possible outcomes because there are 7 triangles the denominator will be 7. Since there are 4 white squares the chances of landing on one is 4/7
10 students averaged 80, so the sum of their scores was (10 x 80) = 800
20 students averaged 89, so the sum of their scores was (20 x 89) = 1,780
All together, the sum of all 30 scores was (800 + 1,780) = 2,580
30 students totaled 2,580, so their average was (2,580 / 30) = <em> 86</em> .
There is 2 chances that both you and your friend can be picked.
Answer:
x=31 is the required number.
Step-by-step explanation:
Let the number be represented as "x".
Then, According to the statement given, "x" exceeds by as much as 44 exceed the number, then the equation can be written as:
⇒
⇒
⇒
⇒
Hence, the required number is x =31.