Mark ( ) against the correct answer in the following. If a, b, c,… - Vidyadip

MCQ

Mark $(\checkmark)$ against the correct answer in the following. If $a, b, c, d$ are in proportion then:

A
$ac = bd$
✓
$ad = bc$
C
$ab = cd$
D
None of these.

✓

Answer

Correct option: B.

$ad = bc$

$\frac{\text{a}}{\text{b}}$
$=\frac{\text{c}}{\text{d}}$
$\Rightarrow\text{ad}=\text{bc}$

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