∑
AMC Hub
历年真题
按考点学
错题本
诊断
验收工具
登录
中
/
EN
AMC Hub
›
AMC 8
›
2022
›
Problem 12
AMC 8 2022 Problem 12
AMC8 2022 年第 12 题
概率
★★★☆☆
T
h
e
a
r
r
o
w
s
o
n
t
h
e
t
w
o
s
p
i
n
n
e
r
s
s
h
o
w
n
b
e
l
o
w
a
r
e
s
p
u
n
.
L
e
t
t
h
e
n
u
m
b
e
r
N
e
q
u
a
l
10
t
i
m
e
s
t
h
e
n
u
m
b
e
r
o
n
S
p
i
n
n
e
r
\textA
,
a
d
d
e
d
t
o
t
h
e
n
u
m
b
e
r
o
n
S
p
i
n
n
e
r
\textB
.
W
h
a
t
i
s
t
h
e
p
r
o
b
a
b
i
l
i
t
y
t
h
a
t
N
i
s
a
p
e
r
f
e
c
t
s
q
u
a
r
e
n
u
m
b
e
r
?
The arrows on the two spinners shown below are spun. Let the number N equal 10 times the number on Spinner \textA, added to the number on Spinner \textB. What is the probability that N is a perfect square number?
T
h
e
a
r
r
o
w
so
n
t
h
e
tw
os
p
inn
er
ss
h
o
w
nb
e
l
o
w
a
r
es
p
u
n
.
L
e
tt
h
e
n
u
mb
er
N
e
q
u
a
l
10
t
im
es
t
h
e
n
u
mb
er
o
n
S
p
inn
er
\textA
,
a
dd
e
d
t
o
t
h
e
n
u
mb
er
o
n
S
p
inn
er
\textB
.
W
ha
t
i
s
t
h
e
p
r
o
babi
l
i
t
y
t
ha
tN
i
s
a
p
er
f
ec
t
s
q
u
a
r
e
n
u
mb
er
?
下图所示的两个转盘上的箭头可自由旋转。数 N 等于 10 乘以转盘 A 上箭头所指的数，再加上转盘 B 上箭头所指的数。问 N 是完全平方数的概率是多少？
A.
1
16
~\dfrac{1}{16}
16
1
B.
1
8
~\dfrac{1}{8}
8
1
C.
1
4
~\dfrac{1}{4}
4
1
D.
3
8
~\dfrac{3}{8}
8
3
E.
1
2
~\dfrac{1}{2}
2
1
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
继续练习
免费刷 2022 整卷 →
登录解锁诊断（看你哪儿弱）→
← Problem 11
2022 年全套
Problem 13 →
