A briefcase contains 11 black beads and 9 burgundy beads. If Ananya picks one bead without replacing it back to the briefcase, and then picks another bead, what is the probability that Ananya gets at least one burgundy bead?

Probability (at least 1 burgundy bead) =

Step-by-step explanation:

Briefcase contains: 11 black beads; 9 burgundy beads

According to the question,

Ananya picked 2 beads without replacement;

Probability (at least 1 burgundy beads) = probability (1 burgundy beads) + probability (2 burgundy beads)

Now, we know that for any event,

probability (occurrence of event) + probability (non occurrence of event) = 1

so, the above case can also be rewritten as

Probability (at least 1 burgundy beads)= 1 - probability (no burgundy beads)

Probability (at least 1 burgundy beads)= 1 - probability (both black beads)

Probability (at least 1 burgundy beads) = 1 - probability (black, black)

Probability (at least 1 burgundy beads) = 1 - ()

Probability (at least 1 burgundy beads) = 1 -

Probability (at least 1 burgundy beads) =

Probability (at least 1 burgundy beads) =

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2