A carrier is simultaneously modulated by two sine waves having modu...

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A carrier is simultaneously modulated by two sine waves having modulation index of \( 0.3 \) and \( 0.4 \). The total modulation index will be
(a) \( 0.1 \)
(b) \( 0.5 \)
(c) \( 0.7 \)
(d) \( 0.35 \)
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