Which of the following statement is correct? The solubility of

• A. gases increases with increase in temperature
• B. gases decreases with increase in temperature
• C. most solid solutes decreases with indease in temperature
• D. most solid solutes is constant

(a) List any three types of mountains.

(b) In what four ways are mountains important to man?

(c) Outline two problems caused by mountains.

Let A and B denote the events that the man wins contracts X and Y respectively.

Then P(A) = 0.5

P(A') = 1 - 0.5 = 0.5

P(B') = 0.3

P(B) = 1 - 0.3 = 0.7

(a) The probability that the man wins both contracts = \(0.5 \times 0.7 = 0.35\).

(b) The probability that the man wins exactly one of the contracts is \(P(A) \times P(B') + P(B) \times P(A')\)

= \(0.5 \times 0.3 + 0.7 \times 0.5\)

= \(0.15 + 0.35\)

= \(0.50\)

(c) Neither of the contracts (i.e not X, not Y) = \(P(A') \times P(B')\)

= \(0.5 \times 0.3\)

= \(0.15\)

in a country with large population of full-time housewives, national income

• A. will be composed of goods produced by women
• B. figures will be grossly under-stated
• C. statistics will be difficult to calculate
• D. figures will be grossly under-stated

Which of the following is a measure of dispersion?

• A. range
• B. percentile
• C. median
• D. quartile

Centralization of power is the basic feature of

• A. federalism
• B. a confederation
• C. a presidential system
• D. a unitary government

Which of the following values on the absolute scale of temperature is the ice point?

• A. 0K
• B. 32K
• C. 100K
• D. 273k

Who is the offeree in this contract ?

• A. Musa
• B. Audu
• C. Adamu
• D. Jacob

The magnitude of the force experienced by a charge of 1.6 x 10\(^{-8}\)C in a uniform electric field of intensity 5 x 105NC\(^{-1}\) is

• A. 3.2 x 10\(^{-14}\)N
• B. 8.0 x 10\(^{-13}\)N
• C. 8.0 x 10\(^{-3}\)N
• D. 3.1 x 10\(^{13}\) N

Wholesalers are often criticized because they

• A. help to break the bulk
• B. finance producers
• C. increase prices
• D. provide after-sales services