問題詳情
3.(15%) Suppose we choose arbitrarily a point from the square with corners at (2,1), (3,1), (2,2)， and (3,2). The random variable X is the area of the triangle with its corners at (2,1), (3,1), and the chosen point. Compute E[X],
參考答案
答案：A
難度：適中0.484848
統計：A(160),B(93),C(22),D(23),E(0)
內容推薦
- ______ cattle for beef production is a major industry in the United Kingdom.(A) Rising(B) Arousin
- Have your passport and flight ticket ready when you _______ to take an airplane.(A) call on (B) b
- Solve x2y" + 5xy' +3y = 0
- 【題組】(b)Find out whether U and V are dependent or independent.
- 【題組】上題的酸鹼反應約可放熱多少kJ？(A) 8 (B) 1 (C) 4 (D) 0.7
- Hundreds of people are reported ________ in the violent earthquake in New Zealand.(A) to kill (B)
- 三、片語選擇：20%(每題2分)The woman __________ crying when she heard the bad news.(A) burst out (B) burst i
- III. Fill-in (10%) For many high school students, tests are a necessary evil that readies them for t
- One mole of ideal gas initially at 27°C is compressed adiabatically from 6 dm3 to 3 dm3 against co
- 12-13為題組已知H＋(aq) + OH－(aq) → H2O(l) + 56 kJ。據此，試回答12-13題。【題組】 欲中和2克的氫氧化鈉，需要0.1 M的硫酸多少毫升？(A) 250
內容推薦
- Seeing the final exam is at hand, Todd _______ all his appointments.(A) called out (B) called for
- 定量氣體於定壓下，溫度由25 ℃升高到26 ℃時，體積增加為原來的若干倍？(A) (B) (C) (D) 。
- 【題組】(A) what (B) where (C) which (D) it
- (20%) Let X1, •••, Xn be a random sample from the uniform distribution over the intervalI.【題組】(a)I
- 【題組】(b) standard reaction enthalpy in kJ mol-1 at 500 K;
- (20%) Let X be a random variable with mean /.i and finite varianceσWc want to test the hypothes
- This was the man ______ the police believed had been murdered.(A) which (B) who(C) whom(D) whose
- 用以中和胃酸的藥劑稱為制酸劑，常用的成分有NaHCOMg(OH)2和Al(OH)3。若欲使500 mL胃酸的pH = 2升至pH = 3，需要氫氧化鎂大約多少毫克？(A) 65 (B) 1
- 【題組】(b)+ 1]. Find the MLE for
- 【題組】(c) standard reaction Gibbs energy in kJ mol-1 at 500 K,
- Yoga can not only help you lose weight ______ also keep your soul and mind healthy.(A) × (B) but
- 【題組】(A) dying (B) death (C) dead (D) died
- Determine the moments of inertia Ix and Iy of the area shown in Figure 2 with respect to centroida
- 【題組】(d) and standard reaction entropy in J mol-1 K-1 at 500 K. (20 points)
- A nuclear family _______ the parents and their children, usually two.(A) is consisted of (B) is m
- Tina got two phone calls, ________ were from her friend Linda.(A) both of which (B) both of them
- 某乾燥氣體在 127 ℃、1 atm 下，體積為 300 mL；若在 2 atm 下，欲使體積變為120 mL，溫度需改變為若干 ℃ ？ (A) 320 K (B) 400 K (C) 640
- The person who I feel ________ you most must be your father.(A) love (B) loves (C) loved (D) lovi
- 體積 1000 mL 之理想氣體，壓力倍增，且溫度自 －86 ℃ 升至 101 ℃，其最終體積約為多少 mL ？(A) (B) (C) (D) 4000
- Laziness often _________ failure.(A) brings about (B) brings up (C) breaks out (D) burns down
- 四、綜合測驗：10%(每題1分) ___1___ the worldwide cell phone boom, the increasing demand ___2___ coltan is unav
- 下列氣體各1克，於同溫、同壓下，何者所占之體積最大？（原子量：C＝12，N＝14，O＝16，S＝32）(A) CH(B) SO(C) CO(D) N2
- 【題組】(A) both of which (B) both of them (C) all of which (D) all of them
- 【題組】(A) on (B) for (C) to (D) in
- Silkworms _________ the leaves of mulberry trees.(A) feed up (B) feed on (C) feed with (D) feed o