Answer:
7/15 is the probability of selecting a boy and a girl.
Step-by-step explanation:
Combination = nCr = n!/((n-r)!r!)
((7C1)(3C1))/(10C2)
= (7*3)/45
=21/45 = 7/15 the probability of selecting a boy and a girl.
Answer:
9/14
Step-by-step explanation:
3/7 ÷ 2/3 <----- write down the problem
= 3/7 × 3/2 <----- multiply by its reciprocal
= 9/14 <----- simplify
Answer:
-216
(-6)^3
Step-by-step explanation:
-6 * (-6*-6)
-6 * 36
-216
or
-6 * -6 *-6
This is -6 multiplied together 3 times
(-6) ^3
Answer:
38336
Step-by-step explanation:
75002 - 36666 = 38336
If i = √-1 ,
then ...
i² = (√-1)² = -1
i³ = - √-1 = -i <== the answer to the question
i⁴ = (i²) · (i²) = (-1) · (-1) = 1
and then the whole thing starts over again, for higher powers of i .
